Question

please help me to solve this sum​

Answer 1

Answer:

√3\2^2-1\2^2

3\4-1\4

2\4

1\2

cos 60

Answer 2

Step-by-step explanation:

LHS:

cos 30° => √3/2 => cos²30° = 3/4

sin 30° => 1/2 => sin²30° = 1/4

thy cos²30° - sin²30° = 3/4 - 1/4 => 2/4 => 1/2

RHS :

cos 60° => 1/2

LHS = RHS hence proved