Trignometric FunctionsDate: 5/31/96 at 20:47:8 From: Anonymous Subject: Trignometric Functions Hi! I have to find the four missing trig functions. I've had a problem with the following two problems: 1. tan x = root3/3 and cos x = -root3/2 I set up a nice little right triangle, using the tangent and cosine, to find out the other functions, but the numbers weren't consistant, or something like that. I don't really know how to explain it, but it didn't work. I had the same problem with the following: 2. sec x = root 2 and sin x = -root2/2 I appreciate any help! Date: 6/2/96 at 17:18:40 From: Doctor Anthony Subject: Re: Trignometric Functions 1) Cos(x) = -sqrt(3)/2 means the angle is in the third quadrant (= 180 + 30 = 210 degrees). tan(x) = 1/sqrt(3) = sqrt(3)/3 sin(x) = -1/2 cosec(x) = -2, cot(x) = sqrt(3), sec(x) = -2/sqrt(3) 2) sin(x)=-sqrt(2)/2 and a positive sec(x) means we are in the fourth quadrant (= 360-45 = 315 degrees), cos(x)= 1/sqrt(2), cosec(x) = -sqrt(2) tan(x) = -1, cot(x) = -1 -Doctor Anthony, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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