SOLUTION: If Cos=k,express the following in terms of k,without using a calculator (1) Sin(108) (2) Cos(-36) Please help me.

Algebra ->  Trigonometry-basics -> SOLUTION: If Cos=k,express the following in terms of k,without using a calculator (1) Sin(108) (2) Cos(-36) Please help me.      Log On


   

Question 1140831: If Cos=k,express the following in terms of k,without using a calculator
(1) Sin(108)
(2) Cos(-36)
Please help me.
Answer by ikleyn(52847) About Me  (Show Source):
You can put this solution on YOUR website!
.

You missed something crucially important in the condition.

Double check with your source.