Question

2 tan ^2 45 degree plus cos^2 30 degree minus sun ^2 60 is equal to?

Answer 1

Answer:

2tan²45° + cos²30° - sin² 60°

$= 2( {1}^{2} ) + (\frac{ \sqrt{3} }{2} )^{2} - ( \frac{ \sqrt{3} }{2}) ^{2} \\ = 2 \times 1 + 0 \\ = 0$

Explanation:

sin60° = cos 30 ° = √3/2

AND TAN 45° = 1