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2 years ago

Simplify square root 144 - 3 square + 2 Square

Mathematics

1 answer:

inna [77]2 years ago

8 0

12 - 9 + 4 = 7. The answer is 7.

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Please someone help me to prove this.

dem82 [27]

<h3>Answer :</h3>

We know that,

$\dag\bf\:sin^2A=\dfrac{1-cos2A}{2}$

$\dag\bf\:sin2A=2sinA\:cosA$

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Now, Let's solve !

$\leadsto\:\bf\dfrac{sin^2A-sin^2B}{sinA\:cosA-sinB\:cosB}$

$\leadsto\:\sf\dfrac{\frac{1-cos2A}{2}-\frac{1-cos2B}{2}}{\frac{2sinA\:cosA}{2}-\frac{2sinB\:cosB}{2}}$

$\leadsto\:\sf\dfrac{1-cos2A-1+cos2B}{sin2A-sin2B}$

$\leadsto\:\sf\dfrac{2sin\frac{2A+2B}{2}\:sin\frac{2A-2B}{2}}{2sin\frac{2A-2B}{2}\:cos\frac{2A+2B}{2}}$

$\leadsto\:\sf\dfrac{sin(A+B)}{cos(A+B)}$

$\leadsto\:\bf{tan(A+B)}$

5 0

3 years ago

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If a =5,c=8 and h=4 what's the area and perimeter

Ilia_Sergeevich [38]

The perimeter is 17 the area is 160

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2 years ago

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9. An object travels along a horizontal straight path at a constant rate. The object travels of the length

pochemuha

Answer:

6 seconds

======================================================

Step-by-step explanation:

let the entire length of path x

The object travels (1/8) of the length of the path (3/4) in second.

using the ratio and proportion to find the total time does it take the object to travel the entire length of the path as following

Length : time

1/8 x : 3/4 sec.

x : (total time)

using scissors metod

Total time = x * (3/4) / ( 1/8 x) = (3/4) / (1/8) = 6 seconds

6 0

2 years ago

2 km 5 m is equal to : a) 2.005 km b) 2.0005 km c)2.5 km d) 2.05 km

siniylev [52]

I believe it's 2.05. Good luck.

5 0

2 years ago

The sides of the hexagon shown are equal in length. The perimeter of the hexagon is at most 42 inches . Find the possible side l

Kisachek [45]

Answer:

Each side is 7 inches

Step-by-step explanation:

A hexagon has 6 sides so if we divided it by it's 42 inches 42/6 it will be 7 each side is 7 inches.

Hope I did it right :)

6 0

3 years ago

Simplify square root 144 - 3 square + 2 Square​

Simplify square root 144 - 3 square + 2 Square