## highschoolmom2010 2 years ago solve for x using sin, cos, tan

1. highschoolmom2010

2. goformit100

ues Pytha goras theorem, or use trigonometric identities directly..... Say what you prefer most ?

3. highschoolmom2010

$\sin 36=\frac{ 10 }{ x }$ $(x*)\sin36=\frac{ 10 }{ x }(* X)$

4. highschoolmom2010

thats as far as i have gotten

5. highschoolmom2010

$X \sin 36=10$

6. ganeshie8

$$(x*)\sin36=\frac{ 10 }{ \cancel{x} }(* \cancel{X})$$

7. ganeshie8

keep going, your target is x

8. highschoolmom2010

how do i get x alone

9. highschoolmom2010

do i divide by sin 36?

10. ganeshie8

yes !

11. highschoolmom2010

so $x=\frac{ 10 }{ \sin 36 }$

12. ganeshie8

looks perfect !

13. highschoolmom2010

17.01

14. highschoolmom2010

or 17 approx

15. ganeshie8

$$17 = \color{red}{\checkmark}$$

16. highschoolmom2010

im unsure sometimes on how to do some steps ^^

17. ganeshie8

you're doing great, takes lil practice thats all :)

18. phi

you got to Xsin36=10 if the problem was x*2 = 10 you would know what to do: divide both sides by 2 the reason you are unsure of what to do is you are forgetting that sin36 is just a fancy way to write down a number. You can always divide both sides by a number.