Test Index

CBSE Class 12 Math 2022 Term I Solved Paper

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Question : 19
Total: 50
The principal value of tan−1(tan‌
9π
8
) is
Solution:     👈: Video Solution
Explanation: tan−1(tan‌
9π
8
)=tan−1(tan(π+‌
π
8
))
=tan−1(tan‌
π
8
)=‌
π
8
‌‌[∵‌
π
8
∈(‌
−π
2
,‌
π
2
)]
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