Answer:
sin a=3/5
cos a=4/5
Step-by-step explanation:
sin A
AB(squared)=AC (squared)+CB(squared) AB(squared)=4(squared)+3(squared)
AB (squared)=16+9
AB (you must put a square root over AB)=25(remember 25 is now a square root)
AB=5
sin a=opposite/hypotenuse
=3/5
cos A
cos a=adjacent/hypotenuse
=4/5
