Trigonometryhard · Past Paper
What is the value of 1 / (1 + sin²θ) + 1 / (1 + cosec²θ)?
A1
B2
Csin²θ
Dcosec²θ
✓ Correct Answer: A — 1
1/(1+sin²) + 1/(1 + 1/sin²) = 1/(1+sin²) + sin²/(sin²+1) = (1+sin²)/(1+sin²) = 1.
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