Categories
Trigonometry

Proof for the Tangent Half-angle Formula

There is one formula called tangent half-angle formula. It’s both interesting and amazing.
After you have learned all identities involving sines and cosines, it’s worth to check this out! You’d find something different but also refreshing, and interesting!

You may know some identities involving sines and cosines, or some involving tangents, but in sum of angles or double angles.

There is one formula called tangent half-angle formula. It’s both interesting and amazing.

Read more. (to be posted)

[The Proof of the Tangent Half-Angle Formula]