Q. $cos [cot^{- 1} (- 3) + \frac{π}{6}] =$

5307 196 KCETKCET 2021Inverse Trigonometric Functions Report Error

A

0

23%

B

1

30%

C

$\frac{1}{2}$

31%

D

$- 1$

16%

Solution:

$cos (π - \frac{π}{6} + \frac{π}{6}) = cos π = - 1$