Finding exact Trig Values (solutions, examples, videos, worksheets, games & activities)
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Find the exact value without a calculator. sin 75^∘=(√([?]+√(□)))/(□) Double-Angle Formulas sin (2 θ)=2 sinθcosθ cos (2 θ)=cos ^2θ-sin ^2θ tan (2 θ)=(2 tanθ)/(1-tan ^2θ) Half-Angle Formulas: sin((θ)/(2))= ±√((1-cosθ)/(2)) cos((θ)/(2))= ±√((1+cosθ)/(2)) tan((θ)/(2))= ±√((1-cosθ)/(1+cosθ))
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