結果 : 1 cos theta 2 is equal to
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Trigonometry Ex :- 8.5 Question no. 5. (i). (Cosecθ - Cotθ)² = (1 - Cosθ)/(1 + Cosθ).

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prove that `(1-costheta)/(1+costheta)=(cosectheta-cottheta)^2`

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