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If cos3theta=cos3alpha, then the value o...

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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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
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