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15 𝙲𝚘𝚘𝚕 𝚖𝚊𝚝𝚑 𝙵𝚊𝚌𝚝𝚜.

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Here are some interesting math facts that you need to know : If you are very interested in mathematics, the facts recorded below will impress you and remember for the facts to increase your fact knowledge about math.  15 facts : 1)  'Hundred' is one such interesting number (100) which does not  mean  at all. It is derived from the Old word "hundrath," which actually means 120 not 100. 2) Most of the persons know about the Pythagoras theorem. But did you know the fact about Pythagoras constant?  √ 2   i.e. 1.414 was the first rational number to be discovered which is known as the Pythagoras constant. 3) In Roman numerals there is no existence of Zero.  4) I have a challenge to find a spelling of a number that obeys alphabetical order : Forty is the only number which has spelling following alphabetical order.  5) Four is only one number in the entire Hindu Arabic number system which can be spelled with the same number of letters as itself.  6)...
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Trigonometry (Class X to XII)

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What is trigonometry?  The word"trigonometry" is a combination of Greek word 'tri', 'gon' and 'matron' where the words means three, arm and measure respectively. Trigonometry is the branch of mathematics that deals the measurement of the sides and angles of a triangle and the relationship between them. About 2000 years ago, the famous Greek astronomer Hipparchus named the branch of mathematics trigonometry. This subject has been discussed in the ancient Hindu book Suryasiddhanta.  Uses of trigonometry : In fact, in ancient times the method of measuring the height of a large hill or the width of a large river was not known or it was a very difficult task.  But now with the help of trigonometry these tasks can be done very easily and effortlessly. Currently trigonometry is a large practical and useful branch of mathematics. It is also diverse in our daily life Widespread use is undeniable.    Trigonometric angles : There a question occurs of positive and...
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