is this right?

$\displaystyle \frac{cos(x)}{(cos^4(x))^{\frac{3}{2}}} = cos^{-5}(x)$

Printable View

- Mar 18th 2008, 09:53 PMlllllbasic simplification question
is this right?

$\displaystyle \frac{cos(x)}{(cos^4(x))^{\frac{3}{2}}} = cos^{-5}(x)$ - Mar 18th 2008, 10:05 PMo_O
Looks good to me. Just a matter of using your power laws.

- Mar 18th 2008, 10:19 PMJameson
Looks good to me too.

- Mar 18th 2008, 10:25 PMTheEmptySet
- Mar 18th 2008, 10:28 PMTheEmptySet
$\displaystyle (\cos^4(x))^{3/2}=|cos(x)|^6$

Dont forget that

$\displaystyle \sqrt{x^2}=|x|$

example x=-2 (Yes)

Yours should be

$\displaystyle \frac{1}{|\cos(x)|\cos^4(x)}$

try $\displaystyle x=\pi$