Trigonometrymedium · Past Paper
The expression 2 cos^2(theta/2) - 1 is equal to:
Acos(theta)
Bsin(theta)
Ccos(2 theta)
Dsin(2 theta)
✓ Correct Answer: A — cos(theta)
This is the sub-multiple angle formula for cos(theta).
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✓ Correct Answer: A — cos(theta)
This is the sub-multiple angle formula for cos(theta).
Share this question