1. verify the following identities?

0 ⤊

1. verify the following identities?

a. sin 2x=2 tan x/1+tan2 x

b. sin 2 0/ sin 0 - cos 2 0/cos 0= sec 0

c. sin (x+y) cos (x-y) +cos (x+y) sin (x-y)=sin 2x

d. cos 2x= cot2 x-1/cot2 x+1

2007-07-08 18:48:19 · 3 answers · asked by . 2 in Science & Mathematics ➔ Mathematics

3 answers

I have verified and they are:
a♦ true!
b♦ true!
c♦ true!
d♦ true!

2007-07-08 19:18:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋

OMG! I hate trig! I failed it once...almost twice. Good luck!

2007-07-09 01:51:12 · answer #2 · answered by Anonymous · 0⤊ 0⤋

u do it i ain't ur slave!

2007-07-09 01:50:54 · answer #3 · answered by NotTheStatusQuo 5 · 0⤊ 0⤋