Question

Evaluate :2 sin2 30_2 con2 45+tan 2 60,

Answer 1

Solution :

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We know that ,


i ) sin 30 = 1/2

ii ) cos 45 = 1/√2

iii ) tan 60 = √3

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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

••••

Answer 2

Answer:

2.5

Step-by-step explanation:

2sin²30 - 2 cos² 45° + tan²60°

= 2×(1/2)² - 2(1/√2)² + (√3)²

= 1/2 - 1 + 3

= 1/2 + 2  

= 2½