(a+b)^2=a^2+2ab+b^2 But why?

So Lets prove it :
Consider a line 

Take any arbitrary point 

So now we can say that length of line is a+b
Now we have to square a+b
that will be



lets add all the squares and rectangles


This will be  a




Now it is a2+b2






Here there are two rectangle in the above diagram

As we know that Area of rectangle is Length X Width

So it will be a x b

Now lets add every square and rectangle

a2 + b2 + a x b + a x bi.e., a2 + b2 + 2ab

Thus 


(a+b)2=a2 + 2ab+b2 

Trick To Convert Fahrenheit and Celsius




Formula :-
To Convert Celsius to Fahrenheit 

°C  x  9/5 + 32 = °F  OR °F = (1.8 x °C) + 32

To Convert Fahrenheit to Celsius
 
(°F  -  32)  x  5/9 = °C OR °C = (°F - 32) / 1.8


Trick To Convert Celsius to Fahrenheit :


You will not get the accurate value of Fahrenheit using this trick.

Step 1 :  Double the celsius

Step 2 : Add 30

For example 

lets take 15 °C

Step 1 :  Double the celsius 15 x 2 = 30

Step 2 : Add 30 so 30 + 30 = 60°F

So it is quite near to the actual answer 59°F

Now to convert  Fahrenheit to Celsius 

Step 1 : Subtract  30

Step 2 : Divide by 2



Program To Convert Celsius to Fahrenheit and Fahrenheit to Celsius

Degrees and Radians Calculator



Converting from Degrees to Radians

 Degrees can be converted to Radians with the help of this formula :

Radians = (Degrees x π) / 180

Converting from Radians to Degrees

Radians can be converted to Degrees with the help of this formula :

Degrees = (Radians x 180) /  π


Symbol : 1 Degree = 1°
               1 Radian = 1c


1 Radian ≈  57.2958°

1 Degree
≈ 0.017460317c


Program to calculate Degrees to Radians and Radians to Degrees

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