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## baldymcgee6 2 years ago Trig identity help?

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1. baldymcgee6

$\frac{{ - 6{{\left( {\cos \left( t \right)} \right)}^2} \cdot \sin \left( t \right)}}{{6{{\left( {\sin \left( t \right)} \right)}^2} \cdot \cos \left( t \right)}} =- \cot(t)$

2. hartnn

just cancel, 6,sint and cos t, from numerator and denominator,what remains ?

3. klimenkov

Can you simplify fractions?

4. baldymcgee6

oh man...

5. baldymcgee6

how did I not see that... embarrassing.. thanks for the help

6. hartnn

welcome ^_^

7. baldymcgee6

hey @hartnn, when taking second derivatives of parametric curves, we use a formula like:|dw:1351710488694:dw| I am allowed to just take the derivative of -cot(t) or do I have to use y dot and x dot??

8. klimenkov

Can you write what you want from the very beginning?

9. hartnn

i'll need entire question to answer that.....

10. baldymcgee6

i'll post a new question and tag you fella's

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