How do you find the reference angle?

Explanation:

In the example shown, the sine and cosine values of the angle are given. Since both are negative, you know the angle θ is in the 3rd quadrant. The reference angle can be found from the magnitude of either the sine or cosine value:

  arccos( |a/r| ) = arccos(√3/2) = arcsin( |b/r| ) = arcsin(1/2) = 30°

in the math equation 8 x 7 = 56, the 8 and the 7 are both factors of 56, since in this lesson we will use square tiles to figure out the factors of a whole find as many different arrays as you can, but follow one important rule: all the rows must have the i can make two rows of nine, so 2 and 9 are both factors of 18.

step-by-step explanation: