Solve each equation for exact solutions.

sin⁻¹ x - 4 tan⁻¹ (-1) = 2π

Solve each equation for exact solutions.

arcsin 2x + arccos x = π/6

Solve each equation for exact solutions.

cos⁻¹ x + tan⁻¹ x = π/2

Solve each equation for exact solutions.

tan⁻¹ x - tan⁻¹ (1/x ) = π/6

Solve each equation for x.

arccos x + arctan 1 = 11π/12

The point (π/4, 1) lies on the graph of y = tan x. Therefore, the point _______ lies on the graph of y = tan⁻¹ x.

Find the exact value of each real number y if it exists. Do not use a calculator.

y = sin⁻¹ 0

Find the exact value of each real number y if it exists. Do not use a calculator.

y = sin⁻¹ (―1)