Prove cos (x - n) = - cOS X.

cos (x - 7) = cos x sin n - sin x cos n = - cos X

cos (x - n) = cos x cos n - sin x sin n = - cos X

cos (x - n = cos x sinn + sin x cos n = - cos X

cos (x - n) = cos x cos n + sin x sin n = - cos x

The probability of a train arriving on time and leaving on time is 0.8. the probability of the same train arriving on time is 0.84. the probability of of this train leaving on time is 0.86.

Suppose the path of a baseball follows the path graphed by the quadratic function f (d) = -0.6d^2+5.4d+0.8 where d is the horizontal distance the ball traveled in yards, and f (d) is the height, in the yards, of the ball at d horizontal yards.

The solution set for - p^2 - 11p = 0 is

Fruit:sugar in 2:3. If 8kg of sugar is used how much fruit?

How do you convert kilograms to pounds

7. A rectangular play area is to be bounded by 120 m of fencing. Determine the maximum area and the dimensions of this rectangle.

A stray dog ate 13 of your muffins. that was 3/10 of all of them. with how many did you start with

The length of a rectangle is 10 more than four times the width. The perimeter of the rectangle is 170 inches. Find the length and width.

Mofor's school is selling tickets to the annual talent show. On the first day of ticket sales the school sold 4 senior citizen tickets and 6 student tickets for a total of $96.

2 units left and 3 units down