To solve the equation 3sin(2x) = 5cosx, you should rewrite it as____.

A. 3sinx + 5cosx = 0
B. cosx(3sinx - 5) = 0
C. cosx(6sinx - 5) = 0

Question

To solve the equation 3sin(2x) = 5cosx, you should rewrite it as____.

A. 3sinx + 5cosx = 0
B. cosx(3sinx - 5) = 0
C. cosx(6sinx - 5) = 0

sdfgsdfgs · Answer

hint: use eqn sin2A = 2sinAcosA

anonymous · Answer

I am want say A but I have a good feeling it is C

sdfgsdfgs · Answer

What happens to the 2x if A is the ans?

anonymous · Answer

Oh, now that I look at this way, I see that I don't see how 2x would go into A as the answer. Therefore taking that out of the equation right?

anonymous · Answer

*problem

sdfgsdfgs · Answer

correct :)

anonymous · Answer

Awesome! I don't think that B would be the answer because it would have to be '6sinx' instead of '3sinx' right?

sdfgsdfgs · Answer

also correct :)

anonymous · Answer

Cool! So that would make the answer C!

anonymous · Answer

Thank you for the time and help! I appreciate it!

sdfgsdfgs · Answer

welcome - u did most of the work urself! :)