मराठी

Prove the following identities: (sec θ + tan θ)/(sec θ – tan θ) = ((1 + sin θ)/cos θ)^2

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प्रश्न

Prove the following identities:

`(sec θ + tan θ)/(sec θ - tan θ) = ((1 + sin θ)/cos θ)^2`

सिद्धांत
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उत्तर

LHS = `((1/(cos θ) + (sin θ)/(cos θ))/(1/(cos θ) - (sin θ)/(cos θ)))`

= `((1 + sin θ))/((1 - sin θ))`

RHS = `(1 + sin θ)^2/(cos^2θ)`

= `(1 + sin θ)^2/((1 - sin^2θ))`

= `((1 + sin θ))/((1 - sin θ))`

∴ LHS = RHS.

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

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