Inverse Trigonometric Functions

Considering only the principal values of the inverse trigonometric functions, the value of -1( (-11)) + 10 (2 -1 ( 1 2 ) ) + 10 (2 -1(2)) is

1. 3 + 7
2. 7
3. 4 + 7
4. 3 - 5

The total number of real solutions of the equation = -1(2 )- 12 -1 ( 6 9+ 2 ) is (Here, the inverse trigonometric functions -1x and -1x assume values in [- 2, 2 ] and (- 2, 2 ), respectively.)

1. 1
2. 2
3. 3
4. 5

Considering only the principal values of the inverse trigonometric functions, the value of ( -1 ( 35 )-2 -1 ( 2 5 ) ) is

1. 724
2. -724
3. -524
4. 524