The classic 60° triangle has a hypotenuse of length 2, an opposite side of length √3 and an adjacent side of length the value of cos(60°)

Using the trigonometry rule for the cosine, we will see that:

cos(60°) = 1/2

Remember that in a right triangle, we have that:

cos(θ) = (adjacent cathetus)/(hypotenuse)

Here we have:

Replacing all that in the equation we get:

cos(60°) = 1/2

If you want to learn more, you can read:

link

The trigonometric values for cos are C = A/H, which means that to find cos(60), you need to divide the adjacent side by the hypotenuse, which in this case gives you 1/2, so that is the value of cos(60).

I hope this helps!

y = - 6

step-by-step explanation:

given the point (- 2, y) lies on the graph then it is a solution of it's equation.

substitute x = - 2 into the equation for value of y

y = 3(- 2) = 3 × - 2 = - 6

the point on the graph is (- 2, 6)

nswer: a   y-axis

step-by-step explanation: