The value of \sin ^{-1} (\cos \frac{3 \pi}{5}) is

CBSE Class 12 Math 2020 Outside Delhi Set 1 Solved Paper

Section - A

Question numbers 1 to 10 are multiple choice questions of 1 mark each. Select the correct option :

Question : 1 of 36

Marks: +1, -0

The value of sin‌−1(cos‌

3π

) is

Solution: 👈: Video Solution

sin‌−1(cos‌

33π

)=sin‌−1(cos(6π+‌

3π

))
=sin‌−1(cos(‌

3π

))
sin‌−1(cos(‌

+‌

))
=sin‌−1(−sin‌(‌

))
∴sin‌−1(cos‌

33π

)=‌

−π

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