sin x/ (sin x + cos x) = tan x / (1 + tan x)
No explanation needed- thanks in advance
2007-04-08 16:02:24 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
this is like a trick question
just multiply the left hand side by (1/cosx)/(1/cosx) and you'll get your ans
ie. multiply both the numerator and the denominator by 1/cosx
2007-04-08 16:08:55 · answer #1 · answered by ong_joce 2 · 0⤊ 0⤋
Divide both the numerator and denominator of the left-hand side by cos x. This is easier than most trig identities, since only one step is required to prove them identical.
2007-04-08 23:05:26 · answer #2 · answered by Pascal 7 · 0⤊ 0⤋
RHS = (sinx/cosx) / (1 + sinx/cosx)
= (sinx/cosx) / [(cosx + sinx)/cosx]
= LHS after canceling (1/cosx) from numerator and denominator.
2007-04-08 23:07:54 · answer #3 · answered by Anonymous · 0⤊ 0⤋