This depends on wether you want your answer in radians or degrees. If you want the answer in degrees, the highest and lowest point of the sin graph wil always be 90, 270, 450... and crosses the zero point at 180, 360, 540... If you want your answer in radians, the graph crosses the zero point, at pi, 2 pi, 3 pi... and has it's highest/lowest point at 1/2 pi, 1 1/2 pi, 2 1/2 pi...
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Do sin(x), square it, and then multiply it by two.
sin7x-sin6x+sin5x
y=-10 sin 5x sin 5x=y/-10 x=asin(y/-10)/5
You cannot. sin(n)/n is an expression, not an equation. An expression cannot be solved.
sin[cos-1(x)] is an expression; it is not an equation (nor inequality). An expression cannot be solved.