Question

Evaluate sin²60- 2tan45 - cos²30​

Answer 1

Answer:

-2

Step-by-step explanation:

$\sin(60) = \frac{ \sqrt{3} }{2}$

$\cos(30) = \frac{ \sqrt{3} }{2}$

$\tan(45) = 1$

Substitute the above values in the equation

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

i.e -2