Cos 3-cos- is equal tocos 3-cos- - - - -

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Sign of Trigonometric Ratios in Different Quadrants

cos 3α/cosα i...

Question

$\frac{cos 3 α}{cos α}$ is equal to

$\frac{cos 3 α}{cos α}$ का मान बराबर है

sin2α

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cos2α

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2cos2α

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2cos2α – 1

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