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CBSE Class 12 Math 2022 Term I Solved Paper

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Question : 7
Total: 50
The principal value of cos−1(‌
1
2
)+sin‌−1(−‌
1
√2
) is
Solution:     👈: Video Solution
Explanation: cos−1(‌
1
2
)‌+sin‌−1(‌
−1
√2
)
‌=cos−1(cos‌
π
3
)−sin‌−1(‌
1
√2
)
‌=‌
π
3
−sin‌−1(sin‌‌
π
4
)
‌=‌
π
3
−‌
π
4
=‌
π
12
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