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Double angular formula

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Find the exact value of a) sin a/2, b) cos a/2, C) tan a/2

tan a= 4/3, a lies in quadrant 3

sin a/2 =

cos a/2 =

tan a/2 =
(type an exact answer, using radicals as needed. simplify answer)

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https://brainmass.com/math/basic-algebra/double-angular-formula-448285

Solution Summary

This solution applies the double angle formula to find out the exact values of sin, cos, and tan.

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