Question

if tan a = 3/4 then cosa = _____________​

Answer 1

Answer:

4 / 5

i hope it will help u

Answer 2

Answer:

12/25

Step-by-step explanation:

Given,

tanA = 3/4

=>p/b = 3/4

=>p= 3k and b=4k

Therefore, h=√(3k)² + (4k)²

                    =5k

Hence , sinA×cosA =p/h × b/h

                               =pb/h²

                               =(3k×4k)/25k²

                               =12k²/25k²

                               =12/25