Q1:
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A. cos A
B. sin A
C. -cos A
D. - sin A
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Answer 1:
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Q2:
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If sin x = 0.8 and cos x = 0.6, find cos 2x |
A. 0.28
B. 1.6
C. 0.96
D. -0.28
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Answer 2:
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Q3:
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Write as a sum:
2cos 35° sin 10°
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A. sin 45° - sin 25°
B. sin 25° - sin 45°
C. sin 45° + sin 25°
D. sin 25° + sin 45°
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Answer 3:
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Q4:
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Write as a product:
sin 50° - sin 40°
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A. 2cos 90° sin 10°
B. -2cos 45° sin 5°
C. 2cos 45° sin 5°
D. cos 45° sin 5°
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Answer 4:
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Q5:
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Which one is false?
cos 2A =
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A. cos2A - sin2A
B. 2sin A cos A
C. 2cos2A - 1
D. 1 - 2sin2A
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Answer 5:
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