determine-the-exact-value-of-the-following-inverse-trigonometric-expression-usin-4

Question

Determine the exact value of the following trigonometric expression by sketching.

tan [cos^-1 (-2/5)]

Accepted Answer

-√(21)/2

Answer

√(21)/2

Answer

-√(21)/5

Answer

√(21)/5

Determine the exact value of the following trigonometric expression by sketching.tan [cos-1 (-2/5)]