right-angles traingles!help!

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marmar29: Senior | Next Rank: 100 Posts; Posts: 61; Joined: Mon Feb 14, 2011 11:39 pm

by marmar29 » Fri Apr 22, 2011 9:52 pm

hello folks!

pls if any can show me how to answer ths q.

a right angled traingle has sides in the ratio 5:12:13. the tangent of the smallest angle is ............
if u can draw it to clarify i w be grateful !

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Source: Beat The GMAT — Quantitative Reasoning | Fri Apr 22, 2011 9:52 pm

vineeshp: Legendary Member; Posts: 965; Joined: Thu Jan 28, 2010 12:52 amFollowed by: 34 members; Thanked: 156 times; GMAT Score:720

by vineeshp » Sat Apr 23, 2011 1:30 am

I dont think you need to know tan and other things in GMAT.

But the smallest angle is the angle opposite the side of length 5.

Sine of the smallest angle is opp side by Hypotenuse = 5/13
Cos of the smallest angle is adjacent side by Hypotenuse = 12/13
Tan = sin/cos = 5/12.

But again, this is outisde GMAT scope, unless I am missing something.

Vineesh,
Just telling you what I know and think. I am not the expert.

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Sat Apr 23, 2011 6:01 am

But again, this is outisde GMAT scope, unless I am missing something.

Vineeshp is absolutely correct. The GMAT does not test one's knowledge of sine, cosine's and tangents.

Brent Hanneson - Creator of GMATPrepNow.com

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