trig help?

[Clip]

hey all, in the problem 1/cosx times sinx/cosx, is the answer sinx/2cosx OR sinx/cos2x?

i thought cos2x was just cos(x+x)

 

[GrimJack]

Am I missing something obvious here? Looks like sinx / cosx^2 to me...

 

[Clip]

thanks. i have been known to miss the obvious