Question

Iftana=3/4 findsina,cosa

Answer 1

tan a=3/4, sec a=root 1+tan SQUARE A = root 1+3/4 SQUARE root 1+9/16 = root 25/16=5/4 cos a is the reciprocal of sec a so, cos a=1/5/4=4/5 sin a=root 1-4/5 square root 1-16/25 root 9/25=3/5