Question

tan² 120⁰ + cos² 150⁰ - sin² 300⁰ =​

Answer 1

$- \sqrt{3 }$

Step-by-step explanation:

$\tan {}^{2} (90 + 30 {}^{ 0} ) + \cos {}^{2} ( 90 + 60 ^{0} ) - { \sin ^{2} (360 - 60) }$

$- \cot(30 ^{0} ) - \sin( {60}^{0} ) + \sin( {60}^{0 } )$

$- \sqrt{3 } - \frac{ \sqrt{3} }{2} + \frac{ \sqrt{3} }{2}$

$- \sqrt{3}$