Share
Explore BrainMass

Verifying a half-angle trigonometric identity

1-cosx= 2/(cos^2(x/2))
How can this be verified?
Read as one minus cosinex equals two over cosine squared x over 2 (half-angle squared)

Solution Summary

A half-angle trigonometric identity is verified. The solution is detailed and well presented. The response received a rating of "5" from the student who originally posted the question.

$2.19