Question

2 tan² 45° + cos² 30° - sin² 60°​

Answer 1

2

$2 tan {}^{2} 45 + cos ^{2} 30 - \sin {60 }^{2} \\ 2 \times (1) {}^{2} + (\sqrt{3 \div 2} ) {}^{2} - ( \sqrt{3 \div 2} ) {}^{2} \\ 2 + 3 \div 4 - 3 \div 4 \\ 8 \div 4 \\ = 2answer$