Cos A) 16/20 or 4/5
Tan A) 12/16 or 3/4
Sin A) 12/20 or 3/5
The answer would be 10. Im not quite sure if thats the answer, im sorry if i get it wrong. Otherwise i hope this helped you! :)
here. I don't know if its right but i hope it is.
Answer:
a2 (10x10) + b2 (4x4) = c2 (100+16)
Answer: √116