Practicing Success
Practicing Success
CUET Preparation Today
If sin Y = x, then what will be the value of cos 2Y (where 0 ≤ Y ≤ 90°) ? |
$(\sqrt{2}-1) x$ $\sqrt{2}x$ $1-2x$ $1-2x^2$ |
$1-2x^2$ |
Given :- sinY = x We know , cos2A = 1 - 2 sin2A cos2Y = 1 - 2 sin2Y = 1 - 2x2 |
