Answer:
steps
Explanation:
1 - sin²θ / (1 - cosθ) = 1 - (1 - cos²θ) /(1 - cosθ)
= 1 - (1 + cosθ)(1 - cosθ) /(1 - cosθ)
= 1 - (1 + cosθ)
= - cosθ
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