Question

Evaluate: - 4 sin2 60 + 3 tan2 30 - 8 cos2 45 sin 90

Answer 1

Answer:

3/4 = 0.75

Step by Step

4× (root 3/2)2 + 3×(1/2)- 8 × (1/root2)2 × 1

= 4×3/4+3×1/4-8×1/2×1

= 4+3/4-4×1

= 3/4= 0.75