highschoolmom2010
  • highschoolmom2010
3. a. What is m
Mathematics
jamiebookeater
  • jamiebookeater
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highschoolmom2010
  • highschoolmom2010
1 Attachment
saifoo.khan
  • saifoo.khan
Use trig ratios to solve a.
highschoolmom2010
  • highschoolmom2010
\[\tan^{-1}(y)=\frac{ 100 }{ 41 }\]

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saifoo.khan
  • saifoo.khan
It seems right to me.
highschoolmom2010
  • highschoolmom2010
now how do i do that ^^ i get NaN when i put it into calculators
saifoo.khan
  • saifoo.khan
Which calc do you have?
saifoo.khan
  • saifoo.khan
You made a mistake.
highschoolmom2010
  • highschoolmom2010
http://www.rapidtables.com/calc/math/Tan_Calculator.htm thats the calc i used
saifoo.khan
  • saifoo.khan
|dw:1375998733252:dw|
highschoolmom2010
  • highschoolmom2010
so do i use tan 100/41 or tan ^-1(100/41)
highschoolmom2010
  • highschoolmom2010
using both i got NaN
highschoolmom2010
  • highschoolmom2010
im still new to this so im horrible at it
saifoo.khan
  • saifoo.khan
Use this.
saifoo.khan
  • saifoo.khan
http://www.mathsisfun.com/scientific-calculator.html
saifoo.khan
  • saifoo.khan
Write 100/41 in the first box then click 'atan'.
highschoolmom2010
  • highschoolmom2010
1.18169909573962
highschoolmom2010
  • highschoolmom2010
but how can
phi
  • phi
you are in radian mode
highschoolmom2010
  • highschoolmom2010
-_- i gotta remember to click degrees
phi
  • phi
that is too far off... atan(100/41)= ? deg
highschoolmom2010
  • highschoolmom2010
omg one sec laptop being stupid
phi
  • phi
I blame it on the loose nut behind the space bar
highschoolmom2010
  • highschoolmom2010
\[\approx68\]
highschoolmom2010
  • highschoolmom2010
@phi very funny you are
phi
  • phi
67.706... deg
highschoolmom2010
  • highschoolmom2010
@ phi it says to the nearest degree = rounding so \[\approx68\]
phi
  • phi
ok
highschoolmom2010
  • highschoolmom2010
so for part b i think that it does matter which function you use, but im not entirely sure why
phi
  • phi
it should not matter, unless two of the legs are given with more precision than the 3rd side.
highschoolmom2010
  • highschoolmom2010
what do you mean with more precision than the third
phi
  • phi
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
highschoolmom2010
  • highschoolmom2010
oh ok
highschoolmom2010
  • highschoolmom2010
@saifoo.khan &@phi thanks for the help
phi
  • phi
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.
highschoolmom2010
  • highschoolmom2010
i saw that too but
highschoolmom2010
  • highschoolmom2010
i wasnt sure on that part of it

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