SOLUTION: Use identities to solve trigonometric equation? sin(x) + sin 2(x) = 0 I use double-angle to make it sin(x)+2sin(x)cos(x) Factoring we see that solving this equation is e

Algebra ->  Trigonometry-basics -> SOLUTION: Use identities to solve trigonometric equation? sin(x) + sin 2(x) = 0 I use double-angle to make it sin(x)+2sin(x)cos(x) Factoring we see that solving this equation is e      Log On


   

Question 925787: Use identities to solve trigonometric equation?
sin(x) + sin 2(x) = 0
I use double-angle to make it sin(x)+2sin(x)cos(x)

Factoring we see that solving this equation is equivalent to solving the two basic equations sin x = 0 and ?
Unsure what this means
Please help
Answer by josgarithmetic(39627) About Me  (Show Source):
You can put this solution on YOUR website!
sin%28x%29%2B2sin%28x%29cos%28x%29=0

sin%28x%29%281%2B2cos%28x%29%29=0

EITHER sin%28x%29=0 OR 2cos%28x%29%2B1=0;
Solve each of them.