prove that secθ - sinθ tanθ = cos θ
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Answer:
cosθ
Step-by-step explanation:
secθ - sinθ tanθ
(1/cosθ) - sinθ (sinθ/cosθ)
1/cosθ - sin²θ/cosθ
1-sin²θ/cosθ
cos²θ/cosθ (because 1-sin²θ = cos²θ)
cosθ
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