Monday
April 21, 2014

Homework Help: math

Posted by jenny on Thursday, August 25, 2011 at 12:46am.

Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the symmetry of the graphs of sin, cos and tan, to find the exact values of sin
-pi/6, cos 5/3pi and tan 4pi/3.
I have found the answers to the first three using the special tables
sin pi/6 = cos pi/3 = 1/2
cos pi/6 = sin pi/3 = root 3/2
tan pi/3 = root 3
tan pi/6 = 1/root 3
I know that the symmetry of sin(-pi/6 is in the third quadrant, so 7pi/6 =
- 0.5
the symmetry of cos 5pi/3 i have taken 2pi - 5pi/3 to give cos pi/3 = 0.5 but i am not too sure where the symmetry comes in
With the tan I do not quite know where to start. Maybe pi + pi/3.
As for plotting the graphs of sin,cos and tan; I do not know where to start here using the pi radians (whereas as usually I am good at plotting graphs. (perhaps it is an age thing :-(

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

MATH - 1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL ...
math - use exact values of the sin,cos and tan of (pi/3) and (pi/6)(which I ...
math - use exact values of the sin,cos and tan of (pi/3) and (pi/6)(which I have...
math - Use the exact values of the sin, cos and tan of pi/3 and pi/6, and the ...
algebra - Can someone please help me do this problem? That would be great! ...
trig - 2sin(x)cos(x)+cos(x)=0 I'm looking for exact value solutions in [0, 3&#...
CALCULUS - If cos(t)=–7/9, find the values of the following trigonometric ...
Math - 1. Let (-7, 4) be a point on the terminal side of (theta). Find the exact...
Math- Trig - 1. Determine the exact value of cos^-1 (pi/2). Give number and ...
math - Prove that for all real values of a, b, t (theta): (a * cos t + b * sin t...

Search
Members