Hi, I was wondering how to solve this problem....
"Write each of the other trigonometric functins of x in tems of sin x."
I know that sin x= (1/csc x), but that's about it.
Thanks!
yeah im rubbish with computers
List of trigonometric identities - Wikipedia, the free encyclopedia
it was supposed to be a link but i still had the image copied and pasted
scroll down and there will be a table of all the identities
For example,
$\displaystyle \tan x=\frac{\sin x}{\cos x}=\frac{\sin x}{\sqrt{1-{{\sin }^{2}}x}}\implies {{\tan }^{2}}x=\frac{{{\sin }^{2}}x}{1-{{\sin }^{2}}x},$ so $\displaystyle \sin x=\frac{\tan x}{\sqrt{1+{{\tan }^{2}}x}}.$
Obviously, this requires restrictions for $\displaystyle x.$ For example, $\displaystyle \cos x=\sqrt{1-\sin^2x}$ works when $\displaystyle 0\le x\le\frac\pi2$ or $\displaystyle \frac{3\pi}2\le x\le2\pi.$