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# Pc 6.5 a_notes

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### Pc 6.5 a_notes

1. 1. February 15, 2012 1
2. 2. February 15, 2012 2
3. 3. February 15, 20126.5 Complex Numbers in Trigonometric FormObjectives:1﴿ Convert complex numbers to trig form and vice versa2﴿ Multiply/Divide complex numbers in trig form.Standard: Math Analysis 2.0 3
4. 4. February 15, 2012Ex. 1﴿ Given: –2+4ia﴿ Graphb﴿ |–2+4i|c﴿ Find the inclination 4
5. 5. February 15, 2012Ex. 2﴿ Given r=5 and θ=142°, find the complex number a+bi at the same location. 5
6. 6. February 15, 2012Trig Form       Complex Form 6
7. 7. February 15, 2012Ex. 3﴿ Write 6–6i in trig form. 7
8. 8. February 15, 2012Ex. 4﴿ Write as a complex number. 8
9. 9. February 15, 2012Multiplying Complex Numbers in Trig FormStandard Form: ﴾a+bi﴿﴾a+bi﴿  = FOILTrig Form:  9
10. 10. February 15, 2012Ex. 5﴿ Find z1z2. 10
11. 11. February 15, 2012Dividing Complex Numbers in Trig FormStandard Form: ﴾a+bi﴿÷﴾a+bi﴿  = multiply by conjugateTrig Form:  11
12. 12. February 15, 2012Ex. 6﴿ Find 12
13. 13. February 15, 2012Assignment:6.5A p. 478 #12­39 ﴾mult. of 3﴿, 47­57 ﴾odd﴿  13
14. 14. February 15, 2012 14
15. 15. February 15, 2012 15
16. 16. February 15, 2012 16