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The value of sin^2alpha+sin(pi/3-alpha)s...

The value of `sin^2alpha+sin(pi/3-alpha)sin(pi/3+alpha)` is

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If cos3theta=cos3alpha, then the value of sintheta can be given by +-sinalpha (b) sin(pi/3+-alpha) sin((2pi)/3+alpha) (d) sin((2pi)/3-alpha)

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