मराठी

Prove the Following Trigonometric Identities ((1 + sin theta)^2 + (1 – sin theta)^2)/(2cos^2 theta) = (1 + sin^2 theta)/(1 – sin^2 theta)

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प्रश्न

Prove the following trigonometric identities:

`((1 + sin theta)^2 + (1 - sin theta)^2)/(2cos^2 theta) = (1 + sin^2 theta)/(1 - sin^2 theta)`

सिद्धांत
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उत्तर

LHS = `(1 sin^2 theta + 2 sin theta + 1 + sin^2 theta -  2 sin theta)/(2 cos theta)`

`=> (2(1 + sin^2 theta))/(2 cos^2 theta) => (1 + sin^2 theta)/(1 - sin^2 theta)`     `[∵ cos^2 theta = 1 - sin^2 theta]`

∴ LHS = RHS Hence proved

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पाठ 11: Trigonometric Identities - EXERCISE 11.1 [पृष्ठ ११.३४]

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आर.डी. शर्मा Mathematics [English] Class 10
पाठ 11 Trigonometric Identities
EXERCISE 11.1 | Q 15. | पृष्ठ ११.३४
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