Question

Formulae for trigonometry for class 12

Answer 1

Trigonometry Class 12 Formulas

Definitionθ=sin−1(x)isequivalenttox=sinθθ=cos−1(x)isequivalenttox=cosθθ=tan−1(x)isequivalenttox=tanθ

Inverse Properties

sin(sin−1(x))=xcos(cos−1(x))=xtan(tan−1(x))=xsin−1(sin(θ))=θcos−1(cos(θ))=θtan−1(tan(θ))=θ

Double Angle and Half Angle Formulas

sin(2x)=2sinxcosxcos(2x)=cos2x–sin2xtan(2x)=2tanx1–tan2xsinx2=±√1–cosx2cosx2=±√1+cosx2tanx2=1−cosxsinx=sinx1+cos

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