Inverse Trigonometric Functions

Matching exercise

    
Match the items on the right to the items on the left.
sin⁻¹x+cos⁻¹x
sin⁻¹x+sin⁻¹y
2sin⁻¹x
2tan⁻¹x
π/2
sin⁻¹(x√(1−y²)+y√(1−x²))
sin⁻¹(2x√(1−x²))
cos⁻¹x((1−x²)/(1+x²))