Mark the tick against the correct answer in the following:
If x ≠ 0 then cos (tan-1 x + cot-1 x) = ?
Given: x 
0
To Find: The value of
cos(
)
Now, let x = cos(
)
x = cos (
) (
)
x = 0 (
1
Mark the tick against the correct answer in the following:
If x ≠ 0 then cos (tan-1 x + cot-1 x) = ?
Given: x 0
To Find: The value ofcos()
Now, let x = cos()
x = cos () ()
x = 0 (