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CBSE Class 12 Math 2019 All India Set 1 Solved Paper

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Question : 2
Total: 29
If y=sin‌−1x+cos−1x, find ‌
dy
dx
.
Solution:  
y=sin‌−1x+cos−1x
⇒‌
dy
dx
=‌
d
dx
(sin‌−1x+cos−1x)
=‌
d
dx
(sin‌−1x)+‌
d
dx
(cos−1x)
=‌
1
√1−x2
−‌
1
√1−x2

=0
Therefore, ‌
dy
dx
=0
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