sinA/2+sinB/2+sinC/2= -1+4cos(pi-A)/4cos(pi-B)/4sin(pi-C/4) prove it?

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sinA/2+sinB/2+sinC/2= -1+4cos(pi-A)/4cos(pi-B)/4sin(pi-C/4) prove it?

look if u dnt know da answers dnt rite STUPID comments!! jus answer it if u no...thanx n those of u dat hav a problem wid da way i type, i gues ur jus bloody OLD!!! Grow up!!

2007-02-21 20:54:18 · 3 answers · asked by Vidyz 1 in Education & Reference ➔ Homework Help

3 answers

sinA/2+sinB/2+sinC/2= -1+4cos(pi-A)/4cos(pi-B)/4sin
(hence proved)

2007-02-22 21:16:36 · answer #1 · answered by mr, rj 2 · 0⤊ 0⤋

Simple...

2007-02-24 02:24:45 · answer #2 · answered by Warrin' Buffit 1 · 0⤊ 0⤋

sorry, im doing that at school and i dont get it too

2007-02-22 05:39:41 · answer #3 · answered by Charles 2 · 0⤊ 0⤋