Verify each equation
1. cos(x + (pi/2)) = -sin x
2. sin(n pi + θ) = -1^(n) sin θ, n is an integer
3. (sin x + cos x)^(2) = 1 + sin 2x

The perimeter of a rhombus with a side of 6 is 24

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax