Trigonometryhard · Past Paper
Simplify: 1 / (1 + sin^2 A) + 1 / (1 + cosec^2 A)
Asin^2 A
Bcos^2 A
C1
D2
✓ Correct Answer: C — 1
1/(1 + sin^2) + 1/(1 + 1/sin^2) = 1/(1 + sin^2) + sin^2/(sin^2 + 1) = (1 + sin^2) / (1 + sin^2) = 1.
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✓ Correct Answer: C — 1
1/(1 + sin^2) + 1/(1 + 1/sin^2) = 1/(1 + sin^2) + sin^2/(sin^2 + 1) = (1 + sin^2) / (1 + sin^2) = 1.
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