If -180o <= 180o , solve the equation

cos(2theta - 70o) = sin(theta+40o)

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- Mar 28th 2009, 07:39 AMVikySolve the equation??
If -180o <= 180o , solve the equation

cos(2theta - 70o) = sin(theta+40o) - Mar 28th 2009, 11:25 AMstapel
A good start would probably to apply sum and difference identities, so you can get and by themselves, and then work from there.

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And note also the double-angle identities:

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See where this leads.... (Wink)

If you get stuck please reply showing your steps and how far you have gotten. Thank you! :D - Mar 30th 2009, 08:32 AMVikythanks
how do i insert the theta symbol?

- Jul 20th 2009, 09:00 PMmr fantastic
Type [tex]\theta[/tex].

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