highschoolmom2010
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.
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saifoo.khan
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Use trig ratios to solve a.
highschoolmom2010
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\[\tan^{-1}(y)=\frac{ 100 }{ 41 }\]
saifoo.khan
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It seems right to me.
highschoolmom2010
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now how do i do that ^^ i get NaN when i put it into calculators
saifoo.khan
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Which calc do you have?
saifoo.khan
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You made a mistake.
saifoo.khan
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|dw:1375998733252:dw|
highschoolmom2010
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so do i use tan 100/41 or tan ^-1(100/41)
highschoolmom2010
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using both i got NaN
highschoolmom2010
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im still new to this so im horrible at it
saifoo.khan
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Use this.
saifoo.khan
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Write 100/41 in the first box then click 'atan'.
highschoolmom2010
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1.18169909573962
highschoolmom2010
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but how can <y=1.2
phi
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you are in radian mode
highschoolmom2010
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-_- i gotta remember to click degrees
phi
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that is too far off... atan(100/41)= ? deg
highschoolmom2010
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omg one sec laptop being stupid
phi
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I blame it on the loose nut behind the space bar
highschoolmom2010
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\[\approx68\]
highschoolmom2010
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@phi very funny you are
phi
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67.706... deg
highschoolmom2010
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@ phi it says to the nearest degree = rounding so
\[\approx68\]
phi
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ok
highschoolmom2010
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so for part b i think that it does matter which function you use, but im not entirely sure why
phi
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it should not matter, unless two of the legs are given with more precision than the 3rd side.
highschoolmom2010
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what do you mean with more precision than the third
phi
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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
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@saifoo.khan &@phi thanks for the help
phi
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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
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i saw that too but
highschoolmom2010
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i wasnt sure on that part of it