Cos(−θ)=√3/3, sinθ< 0 what is the value of sin θ? 2√3/3 - √6/3 - 2√3/3 √6/3

Step-by-step explanation:

The given trigonometric equation is .

We can either use the Pythagorean identity or the right angle triangle  to solve for .

According to the Pythagorean identity,

Recall that, the cosine function is an even function, therefore

.

We substitute this value in to the above Pythagorean identity to get;

But we were given that,

, so we choose the negative value.

The correct answer is B

hi! i think the answer is 1/2 : )