cosec θ + cot θ = 2, cosec θ - cot θ = কত?
Solution
Correct Answer: Option B
আমরা জানি,
cosec2θ - cot2θ = 1
বা, (cosecθ + cotθ) (cosecθ - cotθ) = 1
বা, 2(cosecθ - cotθ) = 1
∴ cosecθ - cotθ = 1/2
cosec2θ - cot2θ = 1
বা, (cosecθ + cotθ) (cosecθ - cotθ) = 1
বা, 2(cosecθ - cotθ) = 1
∴ cosecθ - cotθ = 1/2
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