Verify that tan x cos x = sin x?

1 ⤊

Verify that tan x cos x = sin x?

2007-05-17 10:16:26 · 3 answers · asked by kareatebear 1 in Science & Mathematics ➔ Mathematics

3 answers

by def'n
tanx = sinx / cosx

so
sinx / cosx * cosx = sinx

2007-05-17 10:21:08 · answer #1 · answered by Dr D 7 · 1⤊ 0⤋

Use the quotient identity for tan x: tan x = (sin x)/(cos x)
tan x cos x = sin x
(sin x)/(cos x) cos x = sin x
Now cancel the cosines.
sin x = sin x
Hope this helps.

2007-05-17 17:20:03 · answer #2 · answered by Lee 3 · 0⤊ 0⤋

That's a toughie. Tan x = sin x/cos x. The rest is commentary.

2007-05-17 17:20:45 · answer #3 · answered by cattbarf 7 · 0⤊ 0⤋