The problem is Determine the exact value of sin (2 arccos (8/17)) The triangle for sin (arccos x) = sqroot(1-x^2). I have no idea how the answer is (240/289).
Follow Math Help Forum on Facebook and Google+
Hello, shogunhd! Determine the exact value of: . Let So, is in a right triangle with: . . . Using Pythagorus, we find that: . Hence: . The problem becomes: .
Originally Posted by shogunhd Determine the exact value of sin (2 arccos (8/17)) Similar to this problem. Since Plug and you're done.
View Tag Cloud