Sunday
September 21, 2014

Homework Help: Trigonometry

Posted by Sam on Sunday, December 20, 2009 at 8:25pm.

I had to find the sine, cosine and tangent of -150 degrees. I got - sq. root of 3/2, -1/2, and - sq. root of 3/3. But my book has -1/2 as the sine, and -sq. root of 3/3 as the cosine. Why is this? I thought that it was thirty degrees away from the axis, so I should use pi/3.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Trigonometry - Evaluate the sine, cosine and tangent of -7pi/3. I got 1/2, sq. ...
Trigonometry - I'm trying to find the cosecant of 11 pi/6. The answer is -2, but...
Algebra II - Multiple Choice (theta) means the symbol 0 with the dash in it. 1.)...
Algebra - Can you explain how to find the solution of 3x^2-2x+5, using the ...
Algebra - I had to solve the function g of f where f is x^2+1 and g is sq. root ...
trigonometry - how do you find sin theta and cosine theta of angles? ex. Find ...
Algebra2--- - 1. An artist is designing triangular mirrors. Determine the number...
Algebra 2 .. - 1. An artist is designing triangular mirrors. Determine the ...
Algebra 2.... - 1. An artist is designing triangular mirrors. Determine the ...
Graphing trigonometric function - sine and cosine have a period 2pi tangent and ...

Search
Members