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Day 24 - CRACK SSC MATHS by DEO, Nizamabad Sri P.Ashok garu
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125 观看11:06:24AshrafNzbEdnTech原视频发布: 2026-05-23

This video teaches fundamental trigonometric identities including transformations for angles like 90±θ, 180±θ, and 270±θ, where the function changes based on whether the coefficient is odd or even, and quadrant determines the sign. It covers complementary angles (α+β=90°) where sin(α)=cos(β) and cos(α)=sin(β), and supplementary angles (α+β=180°) where cos(α)=-cos(β) and sin(α)=sin(β). The instructor demonstrates solving complex trigonometric expressions and proves that in any triangle, tan((A+B)/2) × tan(C/2) = 1.

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