trig

no the question is correct

U mean to simplify it..

or how can we solve a statement..

do v need to prove something here??????????
or just solve?????????
put the options...

use the basic formulas of cos for last one take A+B together
and solve

jo aaye hamein bhi bata dena [3]

i did that.................... but what should u prove here.......???????????

leave this questions sindhu there r a bunch of healthy ques waiting 4 u in the forums
do that to make ur concepts[1]

okie..........[1]
just wanted to try ...........this