Multiplication all you have to.do is multiply the denominators.
Answer:
sinF = 
Step-by-step explanation:
sinF =
=
= 
Do 2x2 first which is 4 and then 5+12 which is 17 . 17/4 is 4.25
You would first look at the tens place numbers; 10 and 30. and add them together making 40. after that you'd take the ones places and add them together; 7 and 8. add those together and you'd get 15. to finish you just need to add the two numbers together 40 and 15.
I think it’s 76 because I added it that’s a way i solved it but you can also multiple it by 1 and it will give the the same answer