Math Homework Help

There are 11 faces in the picture. Can you find them all?
For a clearer view you can click the picture and download it. Or press F11.

Normal people find 5 or 6.If you find 8 you have a good sense of observation.
(Of course observation is very essential for learning Mathematics)

If you find 9, your sence of observation is above average.

If you find 10,you are a very good observer.

If you find 11, you are an extreamly good observer.

You may be amazed to hear that people have bothered to dream of jokes with a mathematical theme. Here is a few to keep you going.

• ‘Old mathematicians never die’-they just lose their functions.
• ‘Mathematicians don’t sin-they sine, and always have a nice tan but are forever going off on a tangent.
• Math teacher mum talking to her son-…..’ if I have told you n times I have told you n+1 times’
• What do you call a tea pot of boiling water on top of Mount Everest- H ypotenuse( high pot in use)
>• WHY IS 6 AFRAID OF 7? -Because 789 (7 ate 9)
• What is the sine of 40?- Over the hill.
• What did one math book say to another book?- I have lots of problems.
• SON: Dad, will you do maths homework for me tonight ?
FATHER:No son, it wouldn’t be right.
SON: Well, you can try.

Today we can have a number problem.O.K?

On his way to school, Jim is knocked down by a car.

He noticed the number of the car.

• The digit in thousand’s place is 4 times the digit in unit place
• The digit in ten’s place is half of the digit in thousand’s place
• The digit in hundred’s place is 3 less than the digit in ten’s place
• Two is in the unit place

Find the number.

I think it is very easy to find out.

Ans: 8142

The Law of Cosines

In any triangle ABC ,

If we know the three sides of any triangle, we can find the angles of the triangles using this formula.


Example:

In a triangle ABC, given a=25, b=52, c=63. Find A

Ans.

We have

I think yesterday you had a big laugh after reading math genius. So today we are fresh and can have some lessons from Trigonometry.

We know the three sides and three angles of a triangle are called its parts. The process of finding the unknown parts of a triangle from its known parts is known as solution of a triangle. This has many applications in surveying, navigation, astronomy and other sciences.
In a Triangle ABC, The angles are denoted by A,B,C and the lengths of the corresponding opposite sides BC, CA and AB by a,b, and c respectively.

The Law of Sines


Using this formula we can find solutions of a triangle.If any three parts are given, we can find the other three parts.

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Yesterday I visited a blog. I found this post. I couldn’t stop laughing.
Click here to view that post.

See the picture below

Can you tell me the answer?

It’s an optical illusion.The hypotenuse of both triangles seem to be straight lines but they’re not.
I think the answer lies in the fact that neither shape is actually a triangle, they are quadrilaterals. They have four sides.

The side that looks like it is the hypotenuse is actually two sides, the corner being where the green and red triangle.
I have searched the web and find an answer here.

If you have any good explanation about this please let me know.

There are 10 trees spaced out equally along my street with one at each end. If I run at a steady speed from one end of the street, I can reach the 5 th tree in just 5 seconds.

How long would it take me to run down the whole street at the same pase?
( No, it is not 10 seconds)

Did you get the answer?

When I reach the 5 th tree I cover 4 trees.
So,time taken to cover 4 trees is 5 seconds.
So, time taken to cover 1 tree is 5/4 seconds.
When I reach the 10 th tree I cover 9 trees.
So, time taken to cover 9 trees( and this is same as the time taken to run down the whole street) is 9 multiplies 5/4
ie 45/4
or
11.25 seconds