Trigonometryhard · Past Paper
The value of cos² A + cos²(60+A) + cos²(60-A) is:
A1
B1.5
C2
D3
✓ Correct Answer: B — 1.5
Using identities, the sum simplifies to 3/2 or 1.5, independent of the value of A.
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✓ Correct Answer: B — 1.5
Using identities, the sum simplifies to 3/2 or 1.5, independent of the value of A.
Share this question