Sin ^-1 (( √(3) )/(2)) cos^-1( -\frac{√(3) }2} ) tan^-1(-1) cos^-1 (cos (4 \pi )/(3)})

Question

`sin ^-1 (( √(3) )/(2))`


`cos^-1( -\frac{√(3) }2} )`


`tan^-1(-1)`


`cos^-1 (cos (4 \pi )/(3)})`

Answer 1

#1

the answer is 60.

#2

The answer is 150.

#3

The answer is -45

#4

The answer is 4.18879 ≈ 4.2