Given sin(0) = -1/4 and tan 0 = squareroot of 15/15. what is the value of cos 0?

Step-by-step explanation:

Recall that . Therefore,

In any right triangle:

The sine of an angle is equal to its opposite side divided by the hypotenuse of the triangle (o/h)The cosine of an angle is equal to its adjacent side divided by the hypotenuse of the triangle (a/h)The tangent of an angle is equal to its opposite side divided by its adjacent side (o/a)

From and , we know:

's opposite side is 1's adjacent side is The hypotenuse of the triangle is 4

Therefore, the desired answer is .