Question

2 sin 230° + tan²60-3 Cos²60°-tan² 45°​

Answer 1

2 sin² 30⁰ + tan²60-3 cos²60⁰-tan² 45

= 2 (1/2)²+ (√3)²- 3(1/2)² -1²

=2×1/4 +3-3×1/4-1

=1/2+3-3/4-1

=1/2+2-3/4

=2+8-3/4

=7/4

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