- #1

draotic

- 52

- 0

## Homework Statement

will sum1 prove this ...@=theta

1-cos@ / sin@ = tan(@/2)

## Homework Equations

## The Attempt at a Solution

i tried to do this

cos@ = cos^2(@/2) - sin^2 (@/2)

wat now?

...

thats doesn't get me anywhere

Last edited: