Question

2sin²30°-2cos²45°+tan²60°​

Answer 1

Answer:

2.5

Step-by-step explanation:

We know that ,

i ) sin 30 = 1/2

ii ) cos 45 = 1/√2

iii ) tan 60 = √3

Now ,

2sin²30 - 2 cos² 45° + tan²60°

= 2×(1/2)² - 2(1/√2)² + (√3)²

= 1/2 - 1 + 3

= 1/2 + 2

= 2½

Or

= 2.5