Trigonometrymedium · Past Paper
The value of cos^2(15) - sin^2(15) is:
A1/2
Bsqrt(3)/2
C1
D0
✓ Correct Answer: B — sqrt(3)/2
This is cos(2 * 15) = cos(30) = sqrt(3)/2.
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✓ Correct Answer: B — sqrt(3)/2
This is cos(2 * 15) = cos(30) = sqrt(3)/2.
Share this question