determine the fundamental solution set of sin x = sin 5x
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Originally Posted by maeca determine the fundamental solution set of sin x = sin 5x Case 1: $\displaystyle 5x = x + 2 n \pi$. Case 2: $\displaystyle 5x = (\pi - x) + 2 n \pi$. Solve for x in each case.
is sinA + sin B = 2 sin ((A+B)/2) cos ((A-B)/2)
Originally Posted by maeca is sinA + sin B = 2 sin ((A+B)/2) cos ((A-B)/2) Yes. And I know what you're thinking. That's another way of solving the problem. But the relevant formula for this question is sinA - sin B = 2 sin ((A-B)/2) cos ((A+B)/2)
i would like to ask another question. how can i express tan x/(1-2sin x + 3 cos x) in terms of tan(x/2) thanks for answering my questions...
Originally Posted by maeca i would like to ask another question. how can i express tan x/(1-2sin x + 3 cos x) in terms of tan(x/2) thanks for answering my questions... Read this: PlanetMath: Weierstrass substitution formulas By the way: Questions unrelated to the original questions should be posted as a new thread.
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