Question

Evaluate 2 tans^2 45° + cos^2 30°- sin^2 60°?​

Answer 1

Answer:

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

Step-by-step explanation:

we know the value of tan ,sin and cos

tan45=1

sin60=√3/2

cos 30=1/2

by putting the value of these nos. after squaring we get

tan^2 45°+cos^2 30° + sin^2 60°=2+1/4-3/4=1/2

Answer 2

Step-by-step explanation:

$2 \times 1 + ( { \sqrt{3 } \div 2})^{2} - ( \sqrt{3} \div 2) ^{2} \\ 2 + 3 \div 2 - 3 \div 2 \\ = 2$