Half Angle Formula

In trigonometry, half angle identity formula is used to find the sine, cosine and tangent of an angle θ. Sine and cosine half angle depends on the cosine angle and tangent half angle depends on the sine and cosine of an angle θ. These half angle identities are used in solving the integral of rational fractions.

Trig Half Angle Identities

Formula Used:

sin( θ / 2 ) = √ 1 - cosθ / 2
cos( θ / 2 ) = √ 1 + cosθ / 2
tan( θ / 2 ) = 1 - cosθ / sinθ

Related Calculator:

Using this trigonometry half angle identities formula, we can find the sine, cosine and tangent half angle.


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