2nd Degree Trig Equations

[Leopard111]

question about 2nd degree trig equations.

sin^2x-sinx=0

i can use the quadratic formula to solve this but what would i plug in for a b and c?

 

[Mrspi]

question about 2nd degree trig equations.

sin^2x-sinx=0

i can use the quadratic formula to solve this but what would i plug in for a b and c?

I would try to factor the left side of the equation...why use the quadratic formula when you've got something that is easy to factor?

If you MUST use the quadratic formula, you've got something of the form x^2 - x = 0...what is "a"? What is "b"? What is "c"?

 

[garf]

by anyone of the previous forms you can find the two first solutions, but remember that exist an infinity of solutions (+ /- 180 or 360 )