Hiya, I'm soooooo terrible at maths and I really need help with a question. It's theta, which I know nothing about really.
If sin theta - 2 cos theta = 0 find tan theta
Thanks in advance,
~K x
2006-10-04 06:48:31 · 4 answers · asked by CremeEgg-x 1 in Science & Mathematics ➔ Mathematics
sin x - 2 cos x = 0
-> sin x = 2 cos x
-> sin x/cos x = 2
-> tan x = 2
:)
and theta is just a variable which sounds scary, dont worry abt that!
2006-10-04 06:53:34 · answer #1 · answered by netsavvy_sashi 2 · 1⤊ 0⤋
ok, here we go:
sin theta - 2 cos theta = 0
send 2 cos theta to other side which gives you
sin theta = 0 + 2 cos theta
that is equal to sin theta = 2 cos theta
divide both sides by cos theta and that gives you
sin theta/cos theta = 2
As we know sin theta/ cos theat = tan theta,
tan theta = 2.
2006-10-04 14:00:07 · answer #2 · answered by cosmoboyin 2 · 0⤊ 0⤋
First of all, theta is just a variable. Greek letters
are often used to denote angles.
Next, from your equation we get
sin theta = 2 cos theta
sin theta/cos theta = 2
tan theta = 2.
2006-10-04 13:59:55 · answer #3 · answered by steiner1745 7 · 0⤊ 0⤋
divide both sides by cos theta....
sin theta - 2 cos theta = 0
----------- -------------- ---------
cos theta cos theta cos theta
sin theta/cos theta = tan theta
2*cos theta/cos theta = 2*1=2
0/cos theta= 0
so our equasion becomes
tan theta - 2 = 0
bring the 2 over on the other side.
tan theta = 2
2006-10-04 14:00:14 · answer #4 · answered by The Richest Man in Babylon 3 · 0⤊ 0⤋