Solve cos²t + cos2t + 1=0. Statements:
1. The equation 3cos²t = 0 may be used to solve the equation.
2. The equation cos²t + 2cost + 1 = 0 may be used to solve the equation.
3. t = π/2 + πk, where k = 0, ±1, ±2, ±3.
4. t = π + 2πk, where k = 0, ±1, ±2, ±3.
a. 1 & 3 only.
b. 2 & 4 only.
c. 2 & 3 & 4 only
d. All statements are correct.

What properties allow transformation to be used as a problem solving tool

The two cylinders are similar. if the ratio of their surface areas is 9/1.44 find the volume of each cylinder. round your answer to the nearest hundredth. a. small cylinder: 152.00 m3 large cylinder: 950.02 m3 b. small cylinder: 972.14 m3 large cylinder: 12,924.24 m3 c. small cylinder: 851.22 m3 large cylinder: 13,300.25 m3 d. small cylinder: 682.95 m3 large cylinder: 13,539.68 m3

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)