Solve the equation cos 3theta=1/2, for theta is R, (where theta is in radians)

pi/9, 5pi/9

Step-by-step explanation:

Cos(3theta) = ½

3theta = pi/3, 5pi/3

theta = pi/9, 5pi/9

Keep on adding 2pi/3 to each to get more angles, if required

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are