# 1 other Trig Problem

• Nov 20th 2006, 11:42 AM
qbkr21
1 other Trig Problem
(sin(x)*tan(x))/(cos(x)) can be simplifed to what?

I got:

(sin(x))^2/(cos(x))^3

Thanks for the Help!
• Nov 20th 2006, 11:48 AM
topsquark
Quote:

Originally Posted by qbkr21
(sin(x)*tan(x))/(cos(x)) can be simplifed to what?

I got:

(sin(x))^2/(cos(x))^3

Thanks for the Help!

I don't know what solution is being asked for, but your answer is at least equal to the original expression.

-Dan
• Nov 20th 2006, 11:50 AM
qbkr21
Re:
They want it "Simplified", well them wanting it "Simplified" is causing me heartache tryingn to get in into the computer system.
• Nov 20th 2006, 11:56 AM
topsquark
Quote:

Originally Posted by qbkr21
They want it "Simplified", well them wanting it "Simplified" is causing me heartache tryingn to get in into the computer system.

I can imagine. I would presume that "simplified" in this case would mean in terms of sine and cosine, but you could also argue that they want "as few functions as possible" or "no fractions." For no fractions and only two trig functions we could write this as:
$sin^2(x)sec^3(x)$
for example.

Best of luck! (Go bother your professor about this. If your professor is going to make you use computer software that doesn't ask for an explicit form, then he/she deserves to be bothered! ;) )

-Dan
• Nov 20th 2006, 12:38 PM
Soroban
Hello, qbkr21!

Am I reading it wrong?

Quote:

$\frac{\sin x \tan x}{\cos x}$ can be simplifed to what?

I don't see a "cube" in the problem.

We have: . $\frac{\sin x}{\cos x}\cdot\tan x \;=\;\tan x\cdot\tan x \;=\;\tan^2x$

• Nov 20th 2006, 12:43 PM
topsquark
Quote:

Originally Posted by Soroban
Hello, qbkr21!

Am I reading it wrong?

I don't see a "cube" in the problem.

We have: . $\frac{\sin x}{\cos x}\cdot\tan x \;=\;\tan x\cdot\tan x \;=\;\tan^2x$

:o Fiddlesticks. What he said!

-Dan