Question

if sin a=3/4 then evaluate cosA and tanA​

Answer 1

Step-by-step explanation:

sin a=3/4......given

we know that

sin²a+cos²a=1

(3/4)²+cos²a=1

9/16+cos²a =1

cos²a=9/16-1

cos²a=16-9/16

cos²a=7/4

cosa= = underoot 7 /4

Answer 2

Answer:

cosA = √7/4

TanA =3/√7

Step-by-step explanation:

explained in the image