Hi, I was wondering if anyone could help me evaluate this trig function

sin(Cos^-1(5/13) + Sin^-1(3/5)) =

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- Mar 26th 2006, 06:17 PMdrewms64Evaluating This Trig Function
Hi, I was wondering if anyone could help me evaluate this trig function

sin(Cos^-1(5/13) + Sin^-1(3/5)) = - Mar 26th 2006, 08:27 PMdrewms64
would this be working it to the right way?

using the Sum and Differences forumla of

sin(x+y)=sinXcosY+cosXsinY

Sin(Cos^-1(5/13))Cos(Sin^-1)) + Cos(Cos^-1(5/13))Sin(Sin^-1(3/5)) - Mar 27th 2006, 04:53 AMtopsquarkQuote:

Originally Posted by**drewms64**

-Dan - Mar 27th 2006, 04:28 PMJameson
Draw out your right triangle and work from there. The first term can be found easily this way.

- Apr 3rd 2006, 04:20 PMdrewms64
I was able to use the right triangle way and get

Code:`SIN(COS^-1(5/13))COS(SIN^-1(3/5)) + (5/13)(3/5)`

(12/13)(4/5) + (5/13)(3/5)

(48/65) + (15/65) = 63/65