निम्न को सिद्ध कीजिए-(1 – sinθ) ( – InterviewSolution

1.

निम्न को सिद्ध कीजिए-(1 – sinθ) (1 + sin θ) (1 + tan2θ) = 1

Answer»

L.H.S. = (1 – sinθ) (1 + sinθ) (1 + tan²θ)

= (1 – sin²θ)sec²θ

= cos²θ · sec²θ

= cos²θ 1/cos²θ = 1 = R.H.S.

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