Asked about Sin on Algebra practice exam..

Geometric formulae, word problems, theorems and proofs, etc.
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Asked about Sin on Algebra practice exam..

Postby derek916 » Sun Aug 21, 2011 4:33 am

Well, I'm in college and having taken algebra2 both in hs and college, I cannot recall ever using SIN,COS, Tangent ever. So I'm assuming it's geometry related

Anyways, to view the problem you will need to go here: ... mFormC.pdf and view problem #16.

The problem asks to find Sin(A).

My approach was reading up on SOH CAH TOA
Being SIN i chose the opposite side (I believe is 4) and the Hypotenuse 5

However, the answer was 3/5 which has me confused as I thought the opposite side was opposite of hypotenuse, and adjacent being the short one.

Thanks for helping on my geometry or algebra related question

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Postby stapel_eliz » Sun Aug 21, 2011 1:20 pm

You can learn about "opposite" and "adjacent" (which are "with respect to the angle in question") in this lesson.

Note: The best option is for you to take a trigonometry class before you start calculus! :wink:

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