Question

if cos thita = 3/5 ,the value of sin2 thita will be ___ ( 3/5 ,24/25,5/3)​

Answer 1

[Note : Here, '∆' represents 'theta']

Cos ∆ = ⅗

We know that :-

Sin²∆ + Cos²∆ = 1

Sin²∆ = 1 - Cos²∆

Sin²∆ = 1 - ⅗

Sin²∆ = (5-3)/5

Sin²∆ = ⅖.