Find x of the equation sin5x+sin3x=cosx
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Hello ngkh87, Here it is my point of view about the exercise. I hope you will understand! Bye!
Hello, ngkh87! My solution is similar to Lucio's . . . Solve for We have the Sum-to-Product Identity: . . . which Lucio derived for us. The equation becomes: . And we have: . Factor: . We have two equations to solve: . . . . . . Hence: .
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