2006-12-18 04:58:31 · 13 answers · asked by wicked 1 in Science & Mathematics ➔ Mathematics
False:
sin x/cos x=tan x, the formula for tan 2x is this:
tan 2x=2/cot x-tan x.
I hope that helps!
2006-12-18 05:07:18 · answer #1 · answered by Anonymous · 4⤊ 0⤋
False, sin x/cos x =tan x
2006-12-18 13:01:24 · answer #2 · answered by juicy_wishun 6 · 2⤊ 0⤋
False. sin x / cos x = tan x
2006-12-18 13:41:57 · answer #3 · answered by yupchagee 7 · 3⤊ 0⤋
This is false.... you got to think back to the basics of triginometry...
if we have a right angle triangle and take one angle 'x' (not the right angle) then:
sin x = opposite side/hypotenuse
cos x = adjacent side/hypotenuse
therefore
sin x / cos x = opposite side / adjacent side
but tan x = opposite side / adjacent side
therefore sin x / cos x = tan x
and not tan 2x
This is possibly too longwinded but I was slightly bored....
2006-12-18 13:09:26 · answer #4 · answered by Biggs 3 · 4⤊ 0⤋
False
sin x / cos x = tan x
which is not equal to tan 2x
unless x = n*180 degrees = n*pi radians
where n = 0,1,2,3,4,......
2006-12-18 14:22:56 · answer #5 · answered by T.M.M. 4 · 3⤊ 0⤋
You should know that sin x / cos x = tan x.
Is this equal to tan 2x?
2006-12-18 13:00:49 · answer #6 · answered by Anonymous · 2⤊ 0⤋
False. sin x / cos x = tan x
Because:
sin x = Opposite / Hypotenuse
cos x = Adjacent / Hypotenuse
Tan x = Opposite /Adjacent.
so, sin x / cos x = (Opp / Hyp) / (Adj / Hyp)
which simplifies to Opp / Adj and this is what Tangent is
2006-12-18 14:54:04 · answer #7 · answered by Renaud 3 · 3⤊ 0⤋
False. It equals tan x.
Let x be 45 degrees . The left side is 1 and
the right side is undefined.
2006-12-18 13:17:57 · answer #8 · answered by steiner1745 7 · 3⤊ 0⤋
Mostly, this is false... However, for X=0, 180, 360... , this is true.
I'm guessing this is just a true/false question, which implies generality for X, so false is correct.
2006-12-18 13:31:25 · answer #9 · answered by TankAnswer 4 · 3⤊ 0⤋
False
Sin x / cos x = tan x
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2006-12-18 13:45:28 · answer #10 · answered by SAMUEL D 7 · 3⤊ 0⤋