so there is a right triangle

90 degrees on the bottom left 39 on the bottom right

and 12.1 in length of the hypotenuse

im told to look for all side

i tried using cosine and sine but my answers were

larger than the hypotenuse

any ideas?

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- Aug 4th 2010, 01:12 PMgabrielsome more rt triangle trig
so there is a right triangle

90 degrees on the bottom left 39 on the bottom right

and 12.1 in length of the hypotenuse

im told to look for all side

i tried using cosine and sine but my answers were

larger than the hypotenuse

any ideas? - Aug 4th 2010, 01:25 PMAckbeet
How did you set up your equations? Did you make sure your calculator was in degree mode?

Excellent checking, by the way! That's the right instinct. - Aug 4th 2010, 01:58 PMskeeter
- Aug 4th 2010, 02:24 PMArchie Meade
If your answers were larger than the hypotenuse,

then after

you should get "a" by multiplying both sides by 12.1.

Did you end up with instead?

Also

so you get "b" by multiplying both sides by 12.1.

You will get a value larger than the hypotenuse if you look for instead.

Why is that and why multiply both sides by 12.1? - Aug 4th 2010, 05:11 PMgabriel
skeeter's diagram is exactly how the picture is formed

so i tried the following

cos(39)=b/12.1

but now that u mention it

i forgot to multiply "12.1" to the cos(39) and

i saw that i screwed up the problem there resulting in 9.4 instead of 15

so i think thats where i went wrong