Find the general solutions of:

cos 50 + cos 30 = 0

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- May 14th 2006, 05:33 PMLilDragonflyTrigonometric equations
Find the general solutions of:

cos 50 + cos 30 = 0 - May 14th 2006, 07:52 PMThePerfectHackerQuote:

Originally Posted by**LilDragonfly**

you know what to find all the solutions.

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Use cosine angle sum identity on,

To get,

Thus, each factor is zero,