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प्रश्न
Prove the following:
`(1 - cos2theta)/(1 + cos2theta)` = tan2θ
योग
उत्तर
L.H.S. = `(1 - cos2theta)/(1 + cos2theta)`
= `(2sin^2theta)/(2cos^2theta)`
= tan2θ
= R.H.S.
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Trigonometric Functions of Double Angles
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