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Saurabh Yadav 8 years, 3 months ago

As if u can understand any topic by ncert book than OK but if not then u can see some other and from ur friends
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Ilu Ahirwar 8 years, 3 months ago

There is not any specific name who is known as the father of mathematics. 
As mathematics have been implemented since early ages. 
In beginning man uses it to count either fingers in their hand or count their children( whatever may be the method). In indian ancient sculpture known as rigvedas mentioned a lot of formulas and techniques to solve typical mathematical problems in very simple manner.
Today we know it as "vedic mathematics". 
The names with whom we are familiar like as Pythagoras, Thales, Aryabhatta, Laplace, Euclid, Green, Bassle , Ramanujam just added thier concepts to the mathematics to make it competible with modern world. but mathematics have been using a earlier than these.
It is very clear that we do have using mathematics since last thousands of years. 
In the ancient time Rishi and achyaryas made some calculations about sun , moons, Earth which is still accurate today. 
Hence we can conclude that mathematics is as old as civilization on the earth. It quiet difficult to give a name to any one person as father of mathematics.

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Naveen Sharma 8 years, 3 months ago

{tex}x = 2cosa - cos 2a ..... (1) \\ y = 2sin a - sin2a .... (2) \\ differentiate \ (1) w.r.t \ a, \ we \ get \\ {dx\over da} = -2sina +2.sin2a .... (3) \\ differentiate \ (2) w.r.t \ a, \ we \ get \\ {dy\over da} = 2cosa -2.cos2a .... (4) \\ divide\ (4) \ by \ (3), we\ get \\ {dy\over dx} = {2cosa-2cos2a\over -2sina +2.sin2a}{/tex}

{tex}{dy\over dx} = {cosa-cos2a\over -sina+sin2a}{/tex}

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Debjani Choudhury 5 years, 4 months ago

jawab kha hai

Gaurav Prajapati 5 years, 5 months ago

me aap se hi toh puchh rahi hu
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Tanya Baghel 8 years, 3 months ago

Yes But it doesnt mean that all the questions are from ncert book Some questions are different that is why we have to do practice from any reference book For maths RD Sharma us the best reference book.
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Jay Anjana 8 years, 3 months ago

But for maths too ncert is sufficient

Sarthak Garg 8 years, 3 months ago

bro. when you can read Ncert book after u will never talk this qsn.its my promise to firstly do Ncert

Rushaad Khan 8 years, 3 months ago

No
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Yatharth Tyagi 8 years, 3 months ago

When it is w.r.t. x ans is: 2+3-4cosx
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Agent X 8 years, 3 months ago

Yes when a and b are of same sign
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2x
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Monty Raj 8 years, 3 months ago

Let sinx=t Cosxdx/dt=1 Imtegerate whole by parts
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Sarthak Garg 8 years, 3 months ago

differentiation is _sin2x.2 integration is sin2x/2 + c

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