## Emily778 Group Title Write the ratios for sin A and cos A. The triangle is not drawn to scale. one year ago one year ago

1. Emily778 Group Title

2. Emily778 Group Title

3. Emily778 Group Title

4. Emily778 Group Title

5. Emily778 Group Title

6. satellite73 Group Title

using the old "opposite over hypotenuse" you get $\sin(A)=\frac{3}{5}$

7. satellite73 Group Title

and using "adjacent over hypotenuse" you get $\cos(A)=\frac{4}{5}$

8. Emily778 Group Title

10. Use a trigonometric ratio to find the value of x. Round your answer to the nearest tenth. The triangle is not drawn to scale. (2 points)

9. Emily778 Group Title

Can you please show me step by step on how to do this?

10. satellite73 Group Title

yes

11. satellite73 Group Title

tangent in a right triangle is "opposite over adjacent" so you have $\tan(20)=\frac{9}{x}$

12. Emily778 Group Title

Do I have to put tan on my work?

13. satellite73 Group Title

solve the ratio for $$x$$ and get $x=\frac{9}{\tan(20)}$ to get the number you need a calculator

14. satellite73 Group Title

yes you need tangent for this one since you have the opposite side, and you want the adjacent side

15. satellite73 Group Title

to the nearest tenth it looks like $$24.7$$ http://www.wolframalpha.com/input/?i=9%2Ftan%2820%29

16. Emily778 Group Title

So, do I do 9/20?

17. satellite73 Group Title

talk about "not drawn to scale"!!

18. satellite73 Group Title

oh no, not $$\frac{9}{20}$$ it is $$x=\frac{9}{\tan(20)}$$ to find that number you need a calculator

19. satellite73 Group Title

in english "nine over the tangent of twenty"

20. Emily778 Group Title

I got 24.72.

21. satellite73 Group Title

me too