Question

if 3tan A = 4 , find the value of sin 2A + cos2A​

Answer 1

Answer:

tanA=3/4=P/B

using Pythagoras theorem

H2=P2+B2

H2=(3)2+(4)2

H2=9+16

H2=25

H=5

To find-sin2A+cos2A

sin2A+cos2A=1

so,the answer is 1