JEE Main 2019 — Math solution | Fundamenthol

JEE Main2019Math

Q.

The value of cos²10° – cos10° cos50° + cos²50° is :

A
$\frac{3}{4}$
B
$\frac{3}{2} (1 + cos 20^{o})$
C
$\frac{3}{2}$
D
$\frac{3}{4} + cos 2 0^{o}$

Solution

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