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kotykmax [81]
3 years ago
15

I have a problem from precalculus cosx/1-tanx +sinx/1-cosx =cosx+sinx prove the identity

Mathematics
1 answer:
vovangra [49]3 years ago
7 0

Answer:

see attachment

Step-by-step explanation:

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Write 4.83…. (The 3 repeats infinitely)as a mixed number
kogti [31]

Answer:

4\frac56

Step-by-step explanation:

\frac56=0.8 \dot{3}

\implies 4.8 \dot{3}=4\frac56

6 0
2 years ago
Read 2 more answers
Solve the system of linear equations. 2x + 6y = -3 2x + 6y = 0 Ο Α (0, 2) infinitely many solutions C (9,7) no solution​
galina1969 [7]

Answer:

Step-by-step explanation:

-3 = 2x+6y

2x+6y = 0

By transitivity, -3 = 0, a contradiction. No solution.

If you graph the lines, you will see they are parallel, therefore never intersect.

6 0
2 years ago
What is the area of this question.
frez [133]
The area of a circle is \pi r^2, where r is the radius of the circle. The diameter of a circle is the length of a line that passes through the center of the circle and stops at the perimeter of circle. The radius of a circle is half the diameter. Divide the diameter by 2 to find the radius.
1. 2.8 m / 2 = 1.4 m
2 . \pi (1.2m)^2: Plug in the value we just found for r.
3. \pi 1.44m^2 : Use the order of operations (PEMDAS).
4. \pi * 1.44m^2 = ~4.52 m^2
The area of the circle is equal to 4.52 m^2.
7 0
3 years ago
Pe
Ludmilka [50]

Answer:

The height of the lamp post is 15 feet ⇒ 1st answer

Step-by-step explanation:

The ladder , the lamp post and the ground formed a right triangle, the length of the ladder is its hypotenuse (l), the height of the lamp post (h) and the horizontal distance on the ground between the base of the ladder and the base of the lamp post (d) are the legs of the triangle

By using Pythagoras Theorem ⇒ <em>the square of the hypotenuse is equal to the sum of the squares of the other two legs</em>

∵ l² = h² + d²

∵ The length of the ladder is 25 feet

∴ l = 25

∵ The ladder is placed 20 feet from the lamp post

- That means the distance between the base of the ladder and

   the base of the lamp post on the ground

∴ d = 20

- Substitute the values of l and d in the Pythagoras formula

∵ (25)² = h² + (20)²

∴ 625 = h² + 400

- Subtract 400 from both sides

∴ 225 = h²

- Take √  for both sides

∴ 15 = h

∴ The height of the lamp post is 15 feet

7 0
2 years ago
A man bas five packets and each contains 3 brown sugar cubes,and 1 white sugar cube from each packet. He randomly selects 1 cube
Svetlanka [38]

Answer:

total number of brown sugar cubes = 3

total number of white sugar cubes = 1

total number of sugar cubes = total no of brown sugar cubes + total no of white sugar cubes = 3 + 1 = 4

probability to select one brown sugar cube = total number of brown sugar cube / total number of sugar cube = 3/ 4

therefore the probability of selecting a brown sugar cube is 3/4 or 0.75

3 0
2 years ago
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