SOLUTION: how do i solve this i need like a step by step breakdown 5 cos^2(theta)-4 sin(theta)-4 = 0

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Question 275801: how do i solve this i need like a step by step breakdown
5 cos^2(theta)-4 sin(theta)-4 = 0
Answer by solver91311(16868) About Me  (Show Source):
You can put this solution on YOUR website!




Remember



Therefore



So substitute



Simplify:







Let represent



Factor the quadratic:



Hence,



or



But since



or



And finally, considering the interval :

or

and




John