Geometry

Proving Trigonometric Identities

Proving Trigonometric Identities

         

Which of the following expressions is equal to (sinθtanθ)(cosθcotθ)? \left( \sin{\theta} - \tan{\theta} \right) \left( \cos{\theta} - \cot{\theta} \right) ?

Which of the following expressions is equal to tanθsinθ+cosθ? \tan{\theta} \sin{\theta} + \cos{\theta} ?

Which of the following expressions is equal to tan2θ+cot2θ? \tan^2{\theta} + \cot^2{\theta} ?

Which of the following is equal to sin2x?\sin 2x?

Which of the following expressions is equal to tan2θsin2θ? \tan^2{\theta} - \sin^2{\theta} ?

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