Trigonometrymedium · Past Paper
Find the value of cos² 15° - sin² 15°.
A1/2
B√3/2
C1/√2
D1
✓ Correct Answer: B — √3/2
The expression is cos(2 * 15°) = cos 30° = √3/2.
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✓ Correct Answer: B — √3/2
The expression is cos(2 * 15°) = cos 30° = √3/2.
Share this question