Answer:
180degrees
Step-by-step explanation:
Given the expression cos^2x - cos x - 2 = 0
Let P = cos x
P^2 - P - 2 = 0
Factorize
P^2 - 2P + P - 2 =0
P(P-2)+1(P-2) = 0
P-2 = 0 and P + 1 = 0
P = 2 and P = -1
Since P = cos x
cos x = -1
x = arccos(-1)
x = 180degrees
Hence the require angle is 180degrees
Answer: 0.75 seconds
Step-by-step explanation:
meters divided by meters per second gives seconds.
255m / (340m/s) = 0.75 seconds
Answer:
See below.
Step-by-step explanation:
A cuboid is a polyhedron with 6 rectangular faces. A cube is a polyhedron in which all 6 faces are squares. WE can say that a cube is a special type of cuboid. Note that a cuboid could have some square faces but not all of them square.
Answer:
x≤4.2
Step-by-step explanation:
12.6 ≤ 3x
1. Divide both sides by 3
2. 12.6÷3= 4.2
x≤4.2
