Posted by **emergency!!! please help!** on Monday, February 11, 2013 at 1:27am.

It is given that sin(θ)=15√. In addition, a and b are coprime positive integers such that cos(2θ)=ab. What is the value of a+b?

- trigonometry -
**drwls**, Monday, February 11, 2013 at 2:33am
Your statement sin(ƒÆ)=15ã

doesn't make sense.

- trigonometry -
**Louie**, Monday, February 11, 2013 at 2:35am
^Yeah theta has to be in degrees, or radians. Sq rt of 15 can't be right

- trigonometry -
**drwls**, Monday, February 11, 2013 at 2:38am
If you are trying to write sqrt(15), write it as ã15, not 15ã.

A sine can not exceed 1, buy the way

- trigonometry -
**stenardt**, Tuesday, February 12, 2013 at 6:43am
may this be correct question

It is given that sin(θ)=1/√5. In addition, a and b are coprime positive integers such that cos(2θ)=a/b. What is the value of a+b?

## Answer This Question

## Related Questions

- maths - It is given that sin(θ)=1/√15. In addition, a and b are ...
- Trigonometry - Given that sin(2θ)=2/3, the value of sin^6θ+cos^6θ...
- Trignometry - Let θ be the angle between the x-axis and the line connecting...
- Math (Trigonometry) - θ is an acute angle such that tan(θ)=1/4. What ...
- Math (Trigonometry) - θ is an acute angle such that tan(θ) = 12. What ...
- trig - An object Is propelled upward at an angle θ, 45° < θ<90...
- Math - Calculus - The identity below is significant because it relates 3 ...
- geometry - Suppose θ is an angle strictly between 0 and π 2 such that ...
- algebra!!!! please help me!!!! - Suppose θ is an angle strictly between 0 ...
- Trigonometry - There are four complex fourth roots to the number 4−4√...

More Related Questions