Question

If sinA=3/5 find the value of cos2A​
help meeeeee

Answer 1

7/25

Step-by-step explanation:

cos2A=1-2sin^2A

or, Cos2A=1-2.(3/5)^2

or, Cos2A=1-2(9/25)

or, Cos2A=1-(18/25)

or, Cos2A=(25-18)/25

or, Cos2A=7/25