Trigonometrymedium · Past Paper
Simplify cos(60+A) + cos(60-A).
Acos A
Bsin A
Csqrt(3) cos A
D2 cos A
✓ Correct Answer: A — cos A
2 cos 60 cos A = 2 * (1/2) * cos A = cos A.
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✓ Correct Answer: A — cos A
2 cos 60 cos A = 2 * (1/2) * cos A = cos A.
Share this question