Posted by Preston on Sunday, August 28, 2011 at 6:46am.
cscØ = -3 , so sinØ = -1/3
the sine is negative in III and IV
cosine is positive in I and IV
so you are correct to say that Ø is in IV
make yourself familiar with the CAST rule, here is an explanation for it
http://www.mathsrevision.net/alevel/pages.php?page=36
So your triangle in IV should be a 1-√8 -3 triangle
sinØ = -1/3 , cscØ = -3 (that was the given)
cos = √8/3 , secØ = 3/√8
tanØ = -1/√8 , cotØ = -√8
(Your textbook answer might have written the √8 as 2√2 )
Related Questions
Trigonometric Functions - Determine the Value of all six trigonometric functions...
Trigonometry - I don't understand how I'm supposed set the problem up or...
trig - If theta is the measure of an angle in standard position with the given ...
Precalculus check answers help! - 1.) Find an expression equivalent to sec theta...
Precalculus check answers help! - 1.) Find an expression equivalent to sec theta...
Math - 1. Let (-7, 4) be a point on the terminal side of (theta). Find the exact...
math (trig) - if cos 2 theta = -(1/3) and theta is in Quadrant 2, find sin theta...
Calculus - I wanted to confirm that I solved these problems correctly (we had to...
Trigonometry - Okay, I have been given a trigonometric equation to solve (sin^2(...
trig - Cos theta= 1/3, find the remaining trigonometric functions of the acute ...
For Further Reading
