# another trig equation

• Feb 11th 2011, 06:27 AM
kassums17
another trig equation
2sin squared thaata + 3cos thaata - 3 = 0

$2\sin^{2}(\theta)+3\cos(\theta)-3=0,$
I would use $\sin^{2}(\theta)+\cos^{2}(\theta)=1$ to change the first term into cosines, and then use the quadratic formula. What does that give you?