M mbrez2 Jan 2016 7 0 USA Mar 17, 2016 #1 cos(cos^{-1}3/4+tan^{-1}3) Enter the exact answer as a single fraction. Rationalize the denominator, if required

cos(cos^{-1}3/4+tan^{-1}3) Enter the exact answer as a single fraction. Rationalize the denominator, if required

C chiro MHF Helper Sep 2012 6,608 1,263 Australia Mar 17, 2016 #2 Re: Enter the exact answer as a single fraction. Rationalize the denominator, if requ Hey mbrez2. Hint - I would consider a right angled triangle with appropriate sides.

Re: Enter the exact answer as a single fraction. Rationalize the denominator, if requ Hey mbrez2. Hint - I would consider a right angled triangle with appropriate sides.

skeeter MHF Helper Jun 2008 16,217 6,765 North Texas Mar 17, 2016 #3 Re: Enter the exact answer as a single fraction. Rationalize the denominator, if requ you may also need the sum identity for cosine ... $\cos(\alpha+\beta)=\cos{\alpha}\cos{\beta} - \sin{\alpha}\sin{\beta}$

Re: Enter the exact answer as a single fraction. Rationalize the denominator, if requ you may also need the sum identity for cosine ... $\cos(\alpha+\beta)=\cos{\alpha}\cos{\beta} - \sin{\alpha}\sin{\beta}$