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सिद्ध कीजिए: tan^2 θ + cot^2 θ + 2 = sec^2 θ cosec^2 θ

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Question

सिद्ध कीजिए: tan2 θ + cot2 θ + 2 = sec2 θ cosec2 θ

Theorem
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Solution

सिद्ध करना है:

tan2 θ + cot2 θ + 2 = sec2 θ cosec2 θ

बाएँ पक्ष:

tan2 θ + cot2 θ + 2

ध्यान दें:

tan2 θ + cot2 θ + 2 = (tan θ + cot θ)2

अब,

tan θ + cot θ = `(sin theta)/(cos theta) + (cos theta)/(sin theta) = (sin^2 theta + cos^2 theta)/(sin theta cos theta) = 1/(sin theta cos theta)`

तो,

(tan θ + cot θ)2 = `1/(sin^2 theta cos^2 theta)`

दाएँ पक्ष:

sec2 θ cosec2 θ = `1/(cos^2 theta) · 1/(sin^2 theta) = 1/(sin^2 theta cos^2 theta)`

दोनों पक्ष बराबर हैं।

अतः सिद्ध हुआ की:

tan2 θ + cot2 θ + 2 = sec2 θ cosec2 θ

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2025-2026 (March) Basic - 430/5/2
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