OK, now another problem
I tried to solve the equation like this:
Code:
0.5*sin2x=-cosx
0.5*2*sinx*cosx=-cosx
sinx*cosx=-cosx
sinx=-cosx/cosx=-1
sin^-1(-1)=-90
180-(-90)=270
x=270
My teacher told me that I can't divide by cosx since cosx might equal 0.
And now I'm stuck
