हिंदी

Prove the following identities: 1 + (cot^2θ)/(1 + cosec θ) = cosec θ

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प्रश्न

Prove the following identities:

`1 + (cot^2θ)/(1 + "cosec"  θ) = "cosec"  θ`

प्रमेय
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उत्तर

We know that cot2θ = (cosec2θ – 1).

∴ LHS = `1 + (("cosec"^2θ - 1))/(("cosec"  θ + 1))`

= 1 + (cosec θ – 1)

= cosec θ = RHS

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अध्याय 13: Trigonometric identities - EXERCISE 13A [पृष्ठ ६१७]

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आर.एस. अग्रवाल Mathematics [English] Class 10
अध्याय 13 Trigonometric identities
EXERCISE 13A | Q 3. | पृष्ठ ६१७
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