It is an increasing odd function.
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sin7x-sin6x+sin5x
The differentiation of sin x plus cosx is cos (x)-sin(x).
It is a trigonometric function. It is also continuous.
The proof that sin2A plus sin2B plus sin2c equals 4sinAsinBsinC lies in the fact that (sin 2A + sin 2B + sin 2C) = 4 sinA.sinB.sinC.
cos*cot + sin = cos*cos/sin + sin = cos2/sin + sin = (cos2 + sin2)/sin = 1/sin = cosec