Trig Identity Question Maths question?
How do I solve this trig Identity?
sin^2+2cosx=0
Thank you!
sin^2+2cosx=0
Thank you!
Original post by svetik_lekar
How do I solve this trig Identity?
sin^2+2cosx=0
Thank you!
sin^2+2cosx=0
Thank you!
Ok first, that's not an identity. An identity is something which is always true, no matter what value the variables take. You have an equation, something which is true only for certain, discrete values of a variable.
To solve it, replace sin^2 x with 1- cos^2 x, you get a quadratic in cos x and solve for x.
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