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

What is the volume of a cone that 6 inches tall and 12 inches in diameter

10 - 2 (x-y) = 3x + 1 which shows the equation in standard form? 5x + 2y = - 9 -5x - 2y = 9 -5x + 2y = - 9 2y = 5x - 9

X + 6y = 19; 2x - 14y = - 14

How to solve 2.5h - 15 = 4h

A square of steel with volume 10cm3 and mass production of 75 g is cut precisely in half. The density of the two smaller pieces is now ...

A company dyes two sizes of rugs. A small rug requires 8 hours for dyeing and a medium-size rug requires 12 hours for dyeing. The dyers have to make at least 22 rugs, and they must do it in less than 240 hours.

What is 8 2/7 - 1 1/7

The RANGE of this function is A) [1, 5] B) [3, ∞) C) [-4, ∞) D) (-∞, ∞)

What is the sum of a 6-term geometric series if the first term is 22 and the last term is 1,299,078?

Find the factorization of the polynomial below. x²+3x+2 A. (x+1) (x+2) B. (x+2) (x+2) C. (x+2) (x+3) D. (x+1) (x+3)