1) cos(x-30)=3cos(x+30) find x for 0<x<360 degrees 2) 4tan2xtanx=1 find x for 0<x<2pi in radians thanks
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For the first problem, use the angle sum identities for cosine. and . You should be able to simplify the original equation to and work it from there.
why didn't i thought of that... i'm so stupid... thanks... I just figured out question 2, thanks again icemanfan
Last edited by snowball; Sep 16th 2008 at 01:08 PM.
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