## anonymous 4 years ago Solve cos^-1(3x)-6cos3x=4sin3x

1. anonymous

|dw:1328646687263:dw|

2. anonymous

is it $\cos^{-1}3x ------------ or ---------- \frac{1}{\cos 3x}$

3. anonymous

Aren't they the same thing?

4. anonymous

no

5. anonymous

Then the first one .

6. anonymous

1 - 6 cos^2 3x = 4 sin3x cos3x = 2 sin 6x - ive assumed 1 / cos 3x

7. anonymous

$2\cos^23x=1+\cos6x$

8. anonymous

Can you show steps?

9. anonymous

no

10. anonymous

Wonderful .

11. anonymous

this time do yourself

12. anonymous

And what do you think I would be doing if I had any idea on how to solve them?

13. anonymous

When you are trying you are progressing

14. anonymous

Sleeping is too mainstream anyways . Thank you for your help .