Question
Question: \(\sin \left[ \cot ^ { - 1 } \left( \cos \tan ^ { - 1 } x \right) \right]\)=...
sin[cot−1(costan−1x)]=
A
x2+2x
B
x2+1x
C
x2+21
D
x2+2x2+1
Answer
x2+2x2+1
Explanation
Solution
sin[cot−1(costan−1x)]
=sin[cot−1(coscos−11+x21)]
=sin[cot−11+x21]=sin[sin−12+x21+x2] =2+x21+x2.