Question

Sin2 150°+cos2 120°-tg2 150°​

Answer 1

Ответ:sin=300

Объяснение:

Answer 2

To evaluate the expression sin^2(150°) + cos^2(120°) - tan^2(150°), let's calculate the trigonometric values of the given angles and substitute them into the expression:

We know that sin(150°) = -1/2, cos(120°) = -1/2, and tan(150°) = -√3.

Now, let's substitute these values into the expression:

sin^2(150°) + cos^2(120°) - tan^2(150°) = (-1/2)^2 + (-1/2)^2 - (-√3)^2 = 1/4 + 1/4 - 3 = 1/2 - 3 = -5/2

Therefore, sin^2(150°) + cos^2(120°) - tan^2(150°) is equal to -5/2.