## highschoolmom2010 Group Title 3. a. What is m<Y to the nearest degree? b. Reasoning Suppose you know the lengths of all three sides of a right triangle. Does it matter which trigonometric ratio you use to find the measure of any of the three angles? Explain. one year ago one year ago

1. highschoolmom2010 Group Title

2. saifoo.khan Group Title

Use trig ratios to solve a.

3. highschoolmom2010 Group Title

$\tan^{-1}(y)=\frac{ 100 }{ 41 }$

4. saifoo.khan Group Title

It seems right to me.

5. highschoolmom2010 Group Title

now how do i do that ^^ i get NaN when i put it into calculators

6. saifoo.khan Group Title

Which calc do you have?

7. saifoo.khan Group Title

8. highschoolmom2010 Group Title

http://www.rapidtables.com/calc/math/Tan_Calculator.htm thats the calc i used

9. saifoo.khan Group Title

|dw:1375998733252:dw|

10. highschoolmom2010 Group Title

so do i use tan 100/41 or tan ^-1(100/41)

11. highschoolmom2010 Group Title

using both i got NaN

12. highschoolmom2010 Group Title

im still new to this so im horrible at it

13. saifoo.khan Group Title

Use this.

14. saifoo.khan Group Title
15. saifoo.khan Group Title

Write 100/41 in the first box then click 'atan'.

16. highschoolmom2010 Group Title

1.18169909573962

17. highschoolmom2010 Group Title

but how can <y=1.2

18. phi Group Title

19. highschoolmom2010 Group Title

-_- i gotta remember to click degrees

20. phi Group Title

that is too far off... atan(100/41)= ? deg

21. highschoolmom2010 Group Title

omg one sec laptop being stupid

22. phi Group Title

I blame it on the loose nut behind the space bar

23. highschoolmom2010 Group Title

$\approx68$

24. highschoolmom2010 Group Title

@phi very funny you are

25. phi Group Title

67.706... deg

26. highschoolmom2010 Group Title

@ phi it says to the nearest degree = rounding so $\approx68$

27. phi Group Title

ok

28. highschoolmom2010 Group Title

so for part b i think that it does matter which function you use, but im not entirely sure why

29. phi Group Title

it should not matter, unless two of the legs are given with more precision than the 3rd side.

30. highschoolmom2010 Group Title

what do you mean with more precision than the third

31. phi Group Title

if one side was sqrt(3), but they round it to 1.7, that would not be the best leg to use.... but I think you can use any of the trig functions if you know all 3 sides

32. highschoolmom2010 Group Title

oh ok

33. highschoolmom2010 Group Title

@saifoo.khan &@phi thanks for the help

34. phi Group Title

Part (b) is a strange question Does it matter which trigonometric ratio you use to find the measure of any of the three angles? one of the 3 angles is a 90 degree angle, and you would not use trig to find it.

35. highschoolmom2010 Group Title

i saw that too but

36. highschoolmom2010 Group Title

i wasnt sure on that part of it