trigonometry
posted by emergency!!! please help! .
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
Your statement sin(ƒÆ)=15ã
doesn't make sense. 
trigonometry 
Louie
^Yeah theta has to be in degrees, or radians. Sq rt of 15 can't be right

trigonometry 
drwls
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
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?
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