Question

If sinx=3/5 find cos2x

Answer 1

Answer:

cos2x = ( 1 - 2sin²x )

=> [1 - 2 × ( 3/5 )² ]

=> [ 1 - 2 × 9 /25 )

=> [ 25 - 18 /25 ]

=> 7/25 Answer ✔

Step-by-step explanation:

$<marquee>plz follow me and barainlist also dear friend plz plz plz </marquee>$

Answer 2

Sin X = 3/5
Opp = 3
Adj = 4
Hypo = 5
(Pythagorean triplet)
So cos X= 4/5
And cos^2 X = 16/25
Hope it helps ☺️