tan[1/2cosinverse(√5/3)]
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Step-by-step explanation:
1(3−5)
Given,
y=tan[21cos−1(35)]
Let, x=cos−1(35)
⇒cosx=35
∴y=tan21x
y=tan2x
y=1+cosx1−cosx
=1+351−35
=3+
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