सर्वसमिका सिद्ध करें0.5kon ]90.
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सर्वसमिका sec2θ=1+tan2 θ का प्रयोग करके ... सिद्ध कीजिए कि 1+tan2θ1+secθ=secθ. play ... (मैं) sinθcos(90∘-θ)+sin(90∘-θ)cosθ=1
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