Question

Any help with this is appreciated.

Answer 1

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Answer 2

Does that show?

Answer 3

you need to fins the missing sides from each triangle

for cso(s)



for cos(t)



now you have your triangles so you can find the ratios for sin(s) and sin(t), tan(s) and tan(t)


next you would need to know the expansions

sin(s + t) = sin(s)cos(t) + cos(s)sin(t)

just substitute the appropriate ratios....

hope this helps