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    Trigonometry: Solving Trigonometric Equations and Proving Identities

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    Manipulate trigonometric expressions, sketch graphs of trigonometric functions and solve equations.
    Find the general solution of the following trigonometric equations:
    1.
    a) cosθcos(pi/6)+sinθsin(pi/6) =0.25
    b) 2sin^2 x - 5cosx+ 1 = 0

    2. Prove: cos(θ+ pi/4) - sin(θ + pi/4) = 2cos(θ+ pi/4)

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    https://brainmass.com/math/trigonometry/trigonometry-solving-trigonometric-equations-proving-identies-82126

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    Trigonometric equations are solved and identities are proven. The solution is detailed and well presented.

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