How do you prove sin 3x = 3sin x - 4sin3x?

1.	How do you prove sin 3x = 3sin x - 4sin3x?
Answer» sin 3x= 3 sinx- 4 sin³x Trigonometric functions(also calledcircular functions or angle functions) are real functions that relate an angle of a right-angled triangle to the ratio of the other two side lengths.

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