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Mathematics 15 Online
OpenStudy (anonymous):

help please look at attachment

OpenStudy (anonymous):

OpenStudy (bahrom7893):

Cos(42) = 35/y y = 35/Cos(42)

OpenStudy (anonymous):

but i got a negative number..

Directrix (directrix):

@rini got a negative number.. Would you show your work? That would help in figuring out what is wrong. 35 is positive and so is Cos (42). Question: Is your calculator set to degrees?

OpenStudy (anonymous):

i did 35/cos(42) and got -87.503

Directrix (directrix):

Cosine of an acute angle in this right triangle is defined to be the length of the adjacent leg over the hypotenus. So, Cos(42) = 35/y as Bahrom wrote above. .743 = 35/y .743/1 = 35/y .743 y = 35 y = 35/(.743) y = 26.005

Directrix (directrix):

To two decimal places, y = 26.01

OpenStudy (anonymous):

it said the right anser was 47.1

Directrix (directrix):

The question now in my mind is "Do you see anything wrong with the work here?

Directrix (directrix):

sin 48 = 35/ y .707 = 35/y y = 35/.707 y = 49 .504 which is 49. 50 to two digits. Interesting.

Directrix (directrix):

The answers should be the same. I am working on resolving what ran amok with the calculations.

Directrix (directrix):

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