Question

Evaluate 2tan² 45 + cos² 30 – sin² 60.​

Answer 1

Solution:

Since we know,

tan 45 = 1

cos 30 = 3/2

sin 60 = 3/2

Therefore, putting these values in the given equation:

2(1)² + (√3/2)² – (√3/2)²

2+0

= 2