Question
Question: \(\sin ^ { - 1 } \frac { 4 } { 5 } + 2 \tan ^ { - 1 } \frac { 1 } { 3 } =\)...
sin−154+2tan−131=
A
2π
B
3π
C
4π
D
None of these
Answer
2π
Explanation
Solution
sin−154=tan−134,2tan−131=tan−143=cot−134and
tan−1x+cot−1x=2π.