https://img834.imageshack.us/img834/...at14122012.jpg



https://img191.imageshack.us/img191/...at14122012.jpg


https://img803.imageshack.us/img803/...at14122012.jpg

C-1
A+B+C=180 olur.
sin[(A+B)/2]=sin[(180-C)/2]=sin[90-C/2]=cos(C/2) olur.
Çünkü m+n=90 ise sin(n)=cos(m)'dir.
sin[(A+B)/2]-cos[C/2]=cos[C/2]-cos[C/2]=0 olur.

https://img855.imageshack.us/img855/...at14122012.png

teşekkürler:)

https://img163.imageshack.us/img163/...at15122012.jpg

teşekkürler :)