sin^4x cos^4x=0

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If exp[(sin2x+sin4x+sin6x+....∞)loge2, satisfies the equation x2−9x+8=0, then the value of cosxcosx+sinx, 0<x<π2 is

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If tan x=43, then the value of √(1−sinx)(1+sinx)(1+cosx)(1−cosx) is 

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The value of x in (0,π/2) satisfying the equation √3−1sinx+√3+1cosx=4√2.

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Solve the following equations.
sin4x2−cos4x2=14.

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