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?
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