Question

5. Evaluate : 5 cos2 60 + 4 cos2 30 - tan2 45/
sin2 30 + cos 2 60​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

5 cos² 60° + 4 cos² 30° - tan² 45°/ sin² 30° + cos² 60°

5 × (1/2)² + 4 × (√3/2)² - (1)² / (1/2)² + (1/2)²

5/4 + 4 × 3/4 - 1 / 1/4 + 1/4

5/4 + 3 - 1 / 1/2

17/4 - 1 / 1/2

13/4 / 1/2

13/4 × 2/1

=13/2.