Trigonometric Functions on Right Triangles

2. Trigonometric Functions on Right Triangles / Trigonometric Functions on Right Triangles / Problem 6

Rewrite the following expression in terms of n if cos(y) = n.
8cos(- y) - 2cos(y)

- 10n

10n

12n

Rewrite the following expression in terms of n if cos(y) = n.8cos(- y) - 2cos(y)