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# Pre-Cal 40S Slides September 26, 2007

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### Pre-Cal 40S Slides September 26, 2007

1. 1. Time to get some work done ... students working hard for extra credit
2. 2. Draw a graph for the following equation showing at least 2 periods ... Write another equation for this graph using sine ...
3. 3. Convert each of the following to and exact radian measure. (b) -72° (a) 115° Use the rest of these questions to review for your test, period 4 tomorrow. Convert each of the following to degree measure. (Round to the nearest tenth.) (b) (a)
4. 4. If an arc 20 m long subtends an angle of 4 radians at the centre of a circle, find the radius of the circle.
5. 5. An ant is walking along the edge of a basketball. The diameter of the ball is . if the ant walked through a central angle of 60°, exactly how far did the ant walk?
6. 6. The point P(θ) on the unit circle is not in quadrant II. If sec θ = , find the other 5 trigonometric values for P(θ).
7. 7. Is the point on the unit circle? Justify your answer.
8. 8. Find the exact value for each of the following expressions:
9. 9. Solve the following equations for 0 ≤ θ ≤ 2π. Give exact values where possible. (a) (csc (x) - 1)(sec (x) + 1) = 0 (b) tan x + √(3) = 0
10. 10. Solve the following equations:
11. 11. Find the exact value for each of the following: (a) (b) (c) (d)