Trigonometryhard · Past Paper
Simplify: 1 / (1 + sin² A) + 1 / (1 + cosec² A).
A1
Bsin² A
Ccos² A
D2
✓ Correct Answer: A — 1
1/(1+cosec²) = 1/(1+1/sin²) = sin²/(sin²+1). Adding them: (1+sin²)/(1+sin²) = 1.
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✓ Correct Answer: A — 1
1/(1+cosec²) = 1/(1+1/sin²) = sin²/(sin²+1). Adding them: (1+sin²)/(1+sin²) = 1.
Share this question