| 1 |
sin5Θ + sin3Θ is equal to: |
- A. 2cos 2Θ sin Θ
- B. -2 cos 4Θ sin Θ
- C. -2 sin 4Θ cos Θ
- D. 2 sin 4Θ cos Θ
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| 2 |
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| 3 |
-2 sin α sin ß = |
- A. sin (α + ß) + sin (α - ß)
- B. cos (α + ß) + cos (α - ß)
- C. cos (α + ß) - cos (α - ß)
- D. cos (α - ß) + cos (α - ß)
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| 4 |
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- A. - cot Θ
- B. - tan Θ
- C. tan Θ
- D. none of these
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| 5 |
If sin α = cos ß in any triangle ABC then: |
- A. α + ß = 90°
- B. α + ß = 180°
- C. α + ß = 360°
- D. α + ß
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| 6 |
tan (α - ß ) = |
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| 7 |
A reference angle Θ is always: |
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| 8 |
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- A. quad. I
- B. quad. II
- C. quad. III
- D. quad. IV
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| 9 |
tan (270° + Θ) is equal: |
- A. cot Θ
- B. tan Θ
- C. -cot Θ
- D. -tan Θ
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| 10 |
The angles 90°±Θ, 180°±Θ, 270°±Θ, 360°±Θ, are the: |
- A. composite angles
- B. half angles
- C. quadrantal angles
- D. allied angles
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