Question

Use right triangles to solve cos(arcsin (12/13) + arccos (8/12)

Answer 1

well you need to draw some triangles



next, again you will need to find the missing side so you can find sin(b)



Now I'm not really sure or the expression...

is it

\[\cos[\arcsin(12/13) + \arccos(8/12)]\]

if it is then you will need to use the expansion of cos(A +B)

Answer 2

yes that is the expression but how do you use (a+b)