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1. |
Graph y =  . |
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A. |
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B. |
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C. |
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D. |
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Hint |
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2. |
Simplify sin  . |
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A. |
2 sin x |
B. |
sin x + cos2x |
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C. |
2 cos x |
D. |
tan x |
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Hint |
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3. |
Simplify cos B + tan B sin B |
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A. |
sin B |
B. |
sec B |
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C. |
cot B |
D. |
cos B |
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Hint |
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4. |
Write (cos x)(sec x – cos x) as an expression involving only sin x. |
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A. |
sin2x |
B. |
1- sin2x |
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C. |
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D. |
2 sin x |
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Hint |
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5. |
 is equivalent to _____. |
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A. |
sin2x + cos x |
B. |
2 tan x |
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C. |
tan2x - 1 |
D. |
cot2x |
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Hint |
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6. |
Find the exact value of sin 225°. |
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A. |
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B. |
0 |
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C. |
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D. |
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Hint |
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7. |
Determine sin 2x if x is between 180° and 270° and sin x =  . |
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A. |
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B. |
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C. |
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D. |
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Hint |
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8. |
Find the exact value of cos  if x is between 90° and 180° and
sin x = . |
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A. |
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B. |
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C. |
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D. |
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Hint |
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9. |
How many periods will the function y = 2sin contain in 9 radians? |
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A. |
27 |
B. |
3 |
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C. |
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D. |
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Hint |
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10. |
How is the function y = cos ( ¨C 30) shifted? |
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A. |
shifted 30° to the left |
B. |
shifted 30° down |
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C. |
shifted 30° up |
D. |
shifted 30° to the right |
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Hint |
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11. |
The graph below is a representation of which function? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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12. |
Which of the following statements is false? |
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A. |
sin (  + 360°) = sin |
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B. |
cos ( + 720°) = –cos |
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C. |
cos ( – 180°) = –cos |
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D. |
sin ( + 540°) = –sin |
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Hint |
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13. |
Solve 2 cos 2 = 1. |
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A. |
30°, 150°, 210°, 330° |
B. |
30°, 150° |
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C. |
30°, 330° |
D. |
150°, 210° |
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Hint |
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14. |
Solve  . |
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A. |
90°, 270° |
B. |
0°, 90°, 180°, 270° |
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C. |
0°, 90°, 270° |
D. |
0°, 180° |
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Hint |
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