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Write the value of sin^(-1)(cospi/9) ....

Write the value of `sin^(-1)(cospi/9)` .

Text Solution

Verified by Experts

Given,
`sin^(−1)(cos(pi)/9​)`
`=sin^(−1)(sin(pi/2−(pi)/9​))`
`=(pi)/2−(pi)/9​`
`=(7pi)/(18)​`
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