Find the exact value of the expression. Use a graphing utility to verify your result. (Hint: Make a sketch of a right triangle. Enter your answer in radians.)

Question

tan [arcsin(-10/11)]

It specifically needs to be in radians which is the part I'm struggling with.

Answer 1

After sketching a right triangle you shall see that y = -10, r = 11 and x = -√21.

Tangent is equal to -10 / √21.