Home » Ask & Discuss » Mathematics. » Trignometry « Back to Discussion

Trignometry

Blazing goIITian

Joined:	9 Mar 2008
Post:	555

17 Mar 2009 22:16:01 IST

0 People liked this

256

inverese from bansal

None

cot^-1(1^2+3/4)+cot^-1(2^2+3/4)-------------------upto infinity=tan^-1(2) (cot^-1 means cot inverse and similarly for others)

pl prove it

Share this article on:

Comments (2)

Sahil Gupta

Blazing goIITian

Joined: 10 Jun 2007

Posts: 985

17 Mar 2009 22:42:20 IST

Like 1 people liked this

general term is cot^-1(n²+3/4) or tan^-1(1/ n²+3/4)

Now write n2+3/4 as (n²-1/4)+1

or (n+1/2)(n-1/2) +1

Hence the genral term becomes tan^-1(n+1/2) - tan^-1(n-1/2)

the answer becomes pi/2 - tan^-11/2

ayush

Blazing goIITian

Joined: 9 Mar 2008

Posts: 555

17 Mar 2009 23:10:27 IST

Like 0 people liked this

PL EXPLAIN LITTLE BIT MORE

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team

Free Sign Up!

Preparing for IIT-JEE ?

Arihant Revision Package for IIT JEE - Books, Practice Tests + Rank Predictor

@ INR 1,995/-

For Quick Info

Find Posts by Topics

Physics.

Topics

9401

20093

3672

2186

7617

2827

2638

Mathematics.

Chemistry.

Biology

Institutes

Parents

Board

Fun Zone