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SOAL TRIGONOMETRI KELAS XI
1. Nilai eksak dari cos105 adalah ….
A.
1
4
√2(1 − √3)
B.
1
4
√2(1 + √3)
C.
1
4
√2(√3 − 1)
D.
1
4
√2(√3 + 1)
E.
1
2
√2(1 − √3)
2. Nilai dari cos75 adalah ....
A.
1
4
√2 −
1
4
√6
B.
1
2
√2
C. 1
D.
1
4
√6 −
1
4
√2
E.
1
4
√6 +
1
4
√2
3. Jika 𝛼 dan 𝛽 merupakan sudut-sudut lancip dan sin 𝛼 =
4
5
dan sin 𝛽 =
12
13
, nilai dari cos(𝛼 +
𝛽) = ⋯.
A. −
33
65
B. 0
C.
33
65
D.
63
65
E. 1
4. Nilai dari cos63 ⋅ cos87 − sin 63 ⋅ sin 87 = ⋯.
A. −
1
2
√3
B. −
1
2
2
C. 0
D.
1
2
E.
1
2
√3
5. Nilai eksak dari sin 105 adalah ….
A.
1
4
√2(1 − √3)
B.
1
4
√2(1 + √3)
C.
1
4
√2(√3 − 1)
D.
1
4
√2(√3 + 1)
E.
1
2
√2(1 − √3)
6. Nilai dari sin 75 adalah ….
A.
1
4
√2 −
1
4
√6
B.
1
2
√2
C. 1
D.
1
4
√6 −
1
4
√2
E.
1
4
√6 +
1
4
√2
7. Jika 𝛼 dan 𝛽 merupakan sudut-sudut lancip dan sin 𝛼 =
4
5
dan sin 𝛽 =
12
13
, nilai dari sin(𝛼 +
𝛽) = ⋯.
A. −
33
65
B. 0
C.
33
65
D.
56
65
E. 1
8. Nilai dari sin 63 ⋅ cos87 + cos63 ⋅ sin 87 = ⋯.
A. −
1
2
√3
3
B. −
1
2
C. 0
D.
1
2
E.
1
2
√3
9. Nilai eksak dari cos15 adalah ….
A.
1
4
√2(1 − √3)
B.
1
4
√2(1 + √3)
C.
1
4
√2(√3 − 1)
D.
1
4
√2(√3 + 1)
E.
1
2
√2(1 − √3)
10. Nilai dari cos(−15) adalah ….
A.
1
4
√2 −
1
4
√6
B.
1
2
√2
C. 1
D.
1
4
√6 −
1
4
√2
E.
1
4
√6 +
1
4
√2
11. Jika 𝛼 dan 𝛽 merupakan sudut-sudut lancip dan sin 𝛼 =
4
5
dan sin 𝛽 =
12
13
, nilai dari cos(𝛼 −
𝛽) = ⋯.
A. −
33
65
B. 0
C.
33
65
D.
63
65
E. 1
12. Nilai dari cos70 ⋅ 𝑐𝑜𝑠25 + 𝑠𝑖𝑛70 ⋅ 𝑠𝑖𝑛25 = ⋯.
4
A. −
1
2
√2
B. −
1
2
C. 0
D.
1
2
E.
1
2
√2
13. Nilai eksak dari 𝑠𝑖𝑛15adalah ....
A.
1
4
√2(1 − √3)
B.
1
4
√2(1 + √3)
C.
1
4
√2(√3 − 1)
D.
1
4
√2(√3 + 1)
E.
1
2
√2(1 − √3)
14. Nilai dari 𝑠𝑖𝑛(−15) adalah ....
A.
1
4
√2 −
1
4
√6
B.
1
2
√2
C. 1
D.
1
4
√6 −
1
4
√2
E.
1
4
√6 +
1
4
√2
15. Jika 𝛼dan 𝛽merupakan sudut-sudut lancip dan 𝑠𝑖𝑛𝛼 =
4
5
dan 𝑠𝑖𝑛𝛽 =
12
13
, nilai dari 𝑠𝑖𝑛(𝛼 −
𝛽) = ⋯.
A. −
33
65
B. −
16
65
C. 0
D.
33
65
E.
56
65
5
16. Nilai dari 𝑡𝑎𝑛105 adalah ....
A. −(2 − √3)
B. −(2 + √3)
C. 1
D.
1
4
√6 −
1
4
√2
E. 2 + √3
17. Jika 𝛼dan 𝛽merupakan sudut-sudut lancip dan 𝑠𝑖𝑛𝛼 =
4
5
dan 𝑠𝑖𝑛𝛽 =
12
13
, nilai dari 𝑡𝑎𝑛(𝛼 +
𝛽) = ⋯.
A. −
33
56
B. −
56
33
C.
33
56
D.
56
33
E. 1
18. Nilai dari 𝑡𝑎𝑛15 adalah ....
A. −(2 − √3)
B. −(2 + √3)
C. 1
D.
1
4
√6 −
1
4
√2
E. 2 + √3
19. Jika 𝛼dan 𝛽merupakan sudut-sudut lancip dan 𝑠𝑖𝑛𝛼 =
4
5
dan 𝑠𝑖𝑛𝛽 =
12
13
, nilai dari 𝑡𝑎𝑛(𝛼 −
𝛽) = ⋯.
A. −
16
63
B. −
56
33
C.
16
63
D.
56
33
E. 1
6
20. Jika 𝛼 merupakan sudut lancip dan 𝑠𝑖𝑛𝛼 =
3
5
, maka nilai dari 𝑠𝑖𝑛2𝛼 = ⋯.
A. −
24
25
B. −
7
25
C.
7
25
D.
24
25
E.
24
7
21. Jika 𝛼merupakan sudut lancip dan 𝑠𝑖𝑛𝛼 =
3
5
, maka nilai dari 𝑐𝑜𝑠2𝛼 = ⋯.
A. −
24
25
B. −
7
25
C.
7
25
D.
24
25
E.
24
7
22. Jika 𝛼merupakan sudut lancip dan 𝑠𝑖𝑛𝛼 =
3
5
, maka nilai dari 𝑡𝑎𝑛2𝛼 =. . ..
A. −
24
25
B. −
7
25
C.
7
25
D.
24
25
E.
24
7
23. Jika 𝛼dan 𝛽merupakan sudut lancip dan 𝑡𝑎𝑛𝛼 =
1
2
dan 𝑡𝑎𝑛𝛽 =
1
3
, maka nilai dari 𝑡𝑎𝑛(𝛼 +
2𝛽) =. . ..
A. −2
B. −
9
13
C.
9
13
D. 1
7
E. 2
24. Jika 𝛼dan 𝛽merupakan sudut lancip dan 𝑡𝑎𝑛𝛼 =
1
2
dan 𝑡𝑎𝑛𝛽 =
1
3
, maka nilai dari 𝑡𝑎𝑛(2𝛼 −
𝛽) =. . ..
A. −2
B. −
9
13
C.
9
13
D. 1
E. 2
25. Jika 𝑐𝑜𝑠150 = 𝑝maka nilai dari 𝑠𝑖𝑛75 =. . ..
A. −√
1+𝑝
2
B. −√
1−𝑝
2
C. √
1−𝑝
2
D. √
1+𝑝
2
E. √
1−𝑝
1+𝑝
26. Jika 𝑐𝑜𝑠150 = 𝑝maka nilai dari 𝑐𝑜𝑠75 =. . ..
A. −√
1+𝑝
2
B. −√
1−𝑝
2
C. √
1−𝑝
2
D. √
1+𝑝
2
E. √
1−𝑝
1+𝑝
27. Jika 𝑐𝑜𝑠150 = 𝑝maka nilai dari 𝑡𝑎𝑛75 =. . ..
8
A. −√
1+𝑝
1−𝑝
B. −√
1−𝑝
1+𝑝
C. √
1−𝑝
2
D. √
1+𝑝
1−𝑝
E. √
1−𝑝
1+𝑝
28. Nilai dari 4𝑠𝑖𝑛45𝑐𝑜𝑠15 =. …
A. −(√3 + 1)
B. −
1
2
(√3 − 1)
C. (
1
2
√3 −
1
2
)
D. (
1
2
√3 +
1
2
)
E. √3 + 1
29. Nilai dari 2𝑐𝑜𝑠𝑎𝑠𝑖𝑛2𝑏 =. ...
A. 𝑠𝑖𝑛(𝑎 + 2𝑏) + 𝑠𝑖𝑛(𝑎 − 2𝑏)
B. 𝑠𝑖𝑛(𝑎 + 2𝑏) − 𝑠𝑖𝑛(𝑎 − 2𝑏)
C. 𝑠𝑖𝑛(𝑎 − 2𝑏) − 𝑠𝑖𝑛(𝑎 + 2𝑏)
D. 𝑠𝑖𝑛(𝑎 + 2𝑏) + 𝑐𝑜𝑠(𝑎 − 2𝑏)
E. 𝑠𝑖𝑛(𝑎 + 2𝑏) − 𝑐𝑜𝑠(𝑎 − 2𝑏)
30. Jika 𝑠𝑖𝑛(𝛼 − 𝛽) =
1
2
√3dan 𝑠𝑖𝑛𝛼𝑐𝑜𝑠𝛽 =
1
2
maka nilai dari 𝑠𝑖𝑛(𝛼 + 𝛽) =. ...
A.
1
4
√3
B.
1
2
−
1
2
√3
C.
1
2
+
1
2
√3
D. 1 −
1
2
√3
E. 1 +
1
2
√3

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Soal trigonometri kelas-xi_ipa

  • 1. 1 SOAL TRIGONOMETRI KELAS XI 1. Nilai eksak dari cos105 adalah …. A. 1 4 √2(1 − √3) B. 1 4 √2(1 + √3) C. 1 4 √2(√3 − 1) D. 1 4 √2(√3 + 1) E. 1 2 √2(1 − √3) 2. Nilai dari cos75 adalah .... A. 1 4 √2 − 1 4 √6 B. 1 2 √2 C. 1 D. 1 4 √6 − 1 4 √2 E. 1 4 √6 + 1 4 √2 3. Jika 𝛼 dan 𝛽 merupakan sudut-sudut lancip dan sin 𝛼 = 4 5 dan sin 𝛽 = 12 13 , nilai dari cos(𝛼 + 𝛽) = ⋯. A. − 33 65 B. 0 C. 33 65 D. 63 65 E. 1 4. Nilai dari cos63 ⋅ cos87 − sin 63 ⋅ sin 87 = ⋯. A. − 1 2 √3 B. − 1 2
  • 2. 2 C. 0 D. 1 2 E. 1 2 √3 5. Nilai eksak dari sin 105 adalah …. A. 1 4 √2(1 − √3) B. 1 4 √2(1 + √3) C. 1 4 √2(√3 − 1) D. 1 4 √2(√3 + 1) E. 1 2 √2(1 − √3) 6. Nilai dari sin 75 adalah …. A. 1 4 √2 − 1 4 √6 B. 1 2 √2 C. 1 D. 1 4 √6 − 1 4 √2 E. 1 4 √6 + 1 4 √2 7. Jika 𝛼 dan 𝛽 merupakan sudut-sudut lancip dan sin 𝛼 = 4 5 dan sin 𝛽 = 12 13 , nilai dari sin(𝛼 + 𝛽) = ⋯. A. − 33 65 B. 0 C. 33 65 D. 56 65 E. 1 8. Nilai dari sin 63 ⋅ cos87 + cos63 ⋅ sin 87 = ⋯. A. − 1 2 √3
  • 3. 3 B. − 1 2 C. 0 D. 1 2 E. 1 2 √3 9. Nilai eksak dari cos15 adalah …. A. 1 4 √2(1 − √3) B. 1 4 √2(1 + √3) C. 1 4 √2(√3 − 1) D. 1 4 √2(√3 + 1) E. 1 2 √2(1 − √3) 10. Nilai dari cos(−15) adalah …. A. 1 4 √2 − 1 4 √6 B. 1 2 √2 C. 1 D. 1 4 √6 − 1 4 √2 E. 1 4 √6 + 1 4 √2 11. Jika 𝛼 dan 𝛽 merupakan sudut-sudut lancip dan sin 𝛼 = 4 5 dan sin 𝛽 = 12 13 , nilai dari cos(𝛼 − 𝛽) = ⋯. A. − 33 65 B. 0 C. 33 65 D. 63 65 E. 1 12. Nilai dari cos70 ⋅ 𝑐𝑜𝑠25 + 𝑠𝑖𝑛70 ⋅ 𝑠𝑖𝑛25 = ⋯.
  • 4. 4 A. − 1 2 √2 B. − 1 2 C. 0 D. 1 2 E. 1 2 √2 13. Nilai eksak dari 𝑠𝑖𝑛15adalah .... A. 1 4 √2(1 − √3) B. 1 4 √2(1 + √3) C. 1 4 √2(√3 − 1) D. 1 4 √2(√3 + 1) E. 1 2 √2(1 − √3) 14. Nilai dari 𝑠𝑖𝑛(−15) adalah .... A. 1 4 √2 − 1 4 √6 B. 1 2 √2 C. 1 D. 1 4 √6 − 1 4 √2 E. 1 4 √6 + 1 4 √2 15. Jika 𝛼dan 𝛽merupakan sudut-sudut lancip dan 𝑠𝑖𝑛𝛼 = 4 5 dan 𝑠𝑖𝑛𝛽 = 12 13 , nilai dari 𝑠𝑖𝑛(𝛼 − 𝛽) = ⋯. A. − 33 65 B. − 16 65 C. 0 D. 33 65 E. 56 65
  • 5. 5 16. Nilai dari 𝑡𝑎𝑛105 adalah .... A. −(2 − √3) B. −(2 + √3) C. 1 D. 1 4 √6 − 1 4 √2 E. 2 + √3 17. Jika 𝛼dan 𝛽merupakan sudut-sudut lancip dan 𝑠𝑖𝑛𝛼 = 4 5 dan 𝑠𝑖𝑛𝛽 = 12 13 , nilai dari 𝑡𝑎𝑛(𝛼 + 𝛽) = ⋯. A. − 33 56 B. − 56 33 C. 33 56 D. 56 33 E. 1 18. Nilai dari 𝑡𝑎𝑛15 adalah .... A. −(2 − √3) B. −(2 + √3) C. 1 D. 1 4 √6 − 1 4 √2 E. 2 + √3 19. Jika 𝛼dan 𝛽merupakan sudut-sudut lancip dan 𝑠𝑖𝑛𝛼 = 4 5 dan 𝑠𝑖𝑛𝛽 = 12 13 , nilai dari 𝑡𝑎𝑛(𝛼 − 𝛽) = ⋯. A. − 16 63 B. − 56 33 C. 16 63 D. 56 33 E. 1
  • 6. 6 20. Jika 𝛼 merupakan sudut lancip dan 𝑠𝑖𝑛𝛼 = 3 5 , maka nilai dari 𝑠𝑖𝑛2𝛼 = ⋯. A. − 24 25 B. − 7 25 C. 7 25 D. 24 25 E. 24 7 21. Jika 𝛼merupakan sudut lancip dan 𝑠𝑖𝑛𝛼 = 3 5 , maka nilai dari 𝑐𝑜𝑠2𝛼 = ⋯. A. − 24 25 B. − 7 25 C. 7 25 D. 24 25 E. 24 7 22. Jika 𝛼merupakan sudut lancip dan 𝑠𝑖𝑛𝛼 = 3 5 , maka nilai dari 𝑡𝑎𝑛2𝛼 =. . .. A. − 24 25 B. − 7 25 C. 7 25 D. 24 25 E. 24 7 23. Jika 𝛼dan 𝛽merupakan sudut lancip dan 𝑡𝑎𝑛𝛼 = 1 2 dan 𝑡𝑎𝑛𝛽 = 1 3 , maka nilai dari 𝑡𝑎𝑛(𝛼 + 2𝛽) =. . .. A. −2 B. − 9 13 C. 9 13 D. 1
  • 7. 7 E. 2 24. Jika 𝛼dan 𝛽merupakan sudut lancip dan 𝑡𝑎𝑛𝛼 = 1 2 dan 𝑡𝑎𝑛𝛽 = 1 3 , maka nilai dari 𝑡𝑎𝑛(2𝛼 − 𝛽) =. . .. A. −2 B. − 9 13 C. 9 13 D. 1 E. 2 25. Jika 𝑐𝑜𝑠150 = 𝑝maka nilai dari 𝑠𝑖𝑛75 =. . .. A. −√ 1+𝑝 2 B. −√ 1−𝑝 2 C. √ 1−𝑝 2 D. √ 1+𝑝 2 E. √ 1−𝑝 1+𝑝 26. Jika 𝑐𝑜𝑠150 = 𝑝maka nilai dari 𝑐𝑜𝑠75 =. . .. A. −√ 1+𝑝 2 B. −√ 1−𝑝 2 C. √ 1−𝑝 2 D. √ 1+𝑝 2 E. √ 1−𝑝 1+𝑝 27. Jika 𝑐𝑜𝑠150 = 𝑝maka nilai dari 𝑡𝑎𝑛75 =. . ..
  • 8. 8 A. −√ 1+𝑝 1−𝑝 B. −√ 1−𝑝 1+𝑝 C. √ 1−𝑝 2 D. √ 1+𝑝 1−𝑝 E. √ 1−𝑝 1+𝑝 28. Nilai dari 4𝑠𝑖𝑛45𝑐𝑜𝑠15 =. … A. −(√3 + 1) B. − 1 2 (√3 − 1) C. ( 1 2 √3 − 1 2 ) D. ( 1 2 √3 + 1 2 ) E. √3 + 1 29. Nilai dari 2𝑐𝑜𝑠𝑎𝑠𝑖𝑛2𝑏 =. ... A. 𝑠𝑖𝑛(𝑎 + 2𝑏) + 𝑠𝑖𝑛(𝑎 − 2𝑏) B. 𝑠𝑖𝑛(𝑎 + 2𝑏) − 𝑠𝑖𝑛(𝑎 − 2𝑏) C. 𝑠𝑖𝑛(𝑎 − 2𝑏) − 𝑠𝑖𝑛(𝑎 + 2𝑏) D. 𝑠𝑖𝑛(𝑎 + 2𝑏) + 𝑐𝑜𝑠(𝑎 − 2𝑏) E. 𝑠𝑖𝑛(𝑎 + 2𝑏) − 𝑐𝑜𝑠(𝑎 − 2𝑏) 30. Jika 𝑠𝑖𝑛(𝛼 − 𝛽) = 1 2 √3dan 𝑠𝑖𝑛𝛼𝑐𝑜𝑠𝛽 = 1 2 maka nilai dari 𝑠𝑖𝑛(𝛼 + 𝛽) =. ... A. 1 4 √3 B. 1 2 − 1 2 √3 C. 1 2 + 1 2 √3 D. 1 − 1 2 √3 E. 1 + 1 2 √3