Can someone explain how to find the answer for this pre-calculus question?

Select the best answer.

cot A sin 2A=

a. 1 + cosA

b. 1 + sin2A

c. 1 + cos2A

it is estimated that on a daily basis 15% of the custoners at a local supermarket use the express checkout. What is the probability that one of the first five customers on a given day uses the express checkout?

What are all the angles in math

What is the value of this expression of his expression of c=4

The square root of - 108 minus the square root of - 3

What is the probability that a husband, wife and daughter have the same birthday

How are plate tectonics related to the earth's surface features

If the the dimension of a square place card is 3 1/2 what would the perimeter be?

In 4,346 one 4 is ten times as great as the other 4?

How do I turn 0.333 into a fraction

You need to find the height of most third graders at your school. What type of data display would you use?