Question

If in A ABC, angle C = 90° and tan A =3/4 , prove that
sin A cos B + cos A sin B = 1.​

Answer 1

Answer:

b

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

In,ΔABC with C=90

We have, tanA=3/4

HENCE,WE GET

AC=4

BC=3

AB=5=√4²+3² Using Pythagorus Theorem!

To prove-sinA*cosB+cosA*sinB

sinA=3/5

cosA=4/5

cosB=3/5

sinB=4/5

=3/5*3/5+4/5*4/5

=9/25+16/25

25/25=1

Hence Proved!