## anonymous one year ago Am I on the right path?? Trig equation. $$\cos^2 = sin$$ $$1-sin^2 = sin$$ $$-sin^2-sin+1$$

1. welshfella

yes - but there's an error on the last line - watch the signs and where is the '= 0'

2. anonymous

kk, got ya. Just needed to make sure I was legal by taking cos^2 and transforming it into 1-sin^2 in an equation :-)

3. anonymous

where is the error?? the -sin^2??

4. welshfella

Oh - sorry there's no error (silly me!)i -sin^2 x - sin x + 1 = 0 but its easier to solve quadratic equations with a positive term in x^2 so change all signs giving sin^2 x + sin x - 1 = 0

5. anonymous

Yes, thanks!!!

6. welshfella

yw