i can't solve this trigo equ. :(
Originally Posted by afeasfaerw23231233 I used the identities and
Now, the equation becomes
(I used the formula )
Using the formula the equation becomes
Let and the equation has the roots
So you have to solve the equations and
Originally Posted by afeasfaerw23231233 i can't solve this trigo equ. :(
? Go back to line 1. Substitute and expand. Let . You end up with (but you better check): .
Solve for t. Then solve for x.