Saturday

August 23, 2014

August 23, 2014

Posted by **3nd3r** on Wednesday, June 29, 2011 at 3:32pm.

"Given that sin theta is -1/2 and theta is in quadrant IV, find the cos and tan of theta."

I found 1/2 for cosine and -1 for theta, but the answer sheet said I was incorrect. I am almost positive I did this correctly... can someone double check for me?

- Trigonometry -
**Reiny**, Wednesday, June 29, 2011 at 4:57pmmake a triangle, and you will see that

y = -1, x = sqrt(3) and r = 2

so cos(theta) = sqrt(3)/2

tan(theta) = -1/sqrt(3) or - sqrt(3)/3

**Related Questions**

Calculus - I wanted to confirm that I solved these problems correctly (we had to...

Maths- complex numbers - Find tan(3 theta) in terms of tan theta Use the formula...

trig - If sin theta is equal to 5/13 and theta is an angle in quadrant II find ...

trigonometry - can you correct the rest for me please? Express each as a ...

trigonometry - can you correct the rest for me please? Express each as a ...

Trigonometry - express in terms of sine and cosine. a) tan theta/ cot theta i ...

easy trig - If sin(theta)=[sqrt(70)]/7 and theta is in Quadrant two, find the ...

simple trig - If sin(theta)=[sqrt(70)]/7 and theta is in Quadrant two, find the ...

math - I have a question I have been working on since yesterday and I am not ...

math (trig) - if cos 2 theta = -(1/3) and theta is in Quadrant 2, find sin theta...