Question

What is the value of cos150° and cos210°

Correct answer get brainliest, bad answer get report

Answer 1

Answer:

The answer will be -√3/2 and -√3/2;

Step-by-step explanation:

cos 150 = cos (180- 30)

Here, we know that, cos (180-θ) = -cosθ;

Thus, cos 150 = -cos 30

cos 150 = -√3/2;

cos 210°= cos (180+30)

Now, we know that, cos(180+θ) = -cos θ;

Thus, cos 210° = - cos30

cos 210= -√3/2;

That's all.