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

Trignometry

New kid on the Block

Joined:	11 Feb 2012
Post:	2

11 Feb 2012 22:40:51 IST

0 People liked this

188

Plese solve it.

Mathematics

If tan^2+cot^2 =2 then what is value of tan^100 +cot^100 ?

Share this article on:

Comments (3)

sathyaram

Blazing goIITian

Joined: 25 Jul 2011

Posts: 322

11 Feb 2012 23:46:56 IST

Like 0 people liked this

(1+2^100)/2^50 ???

hemang

Blazing goIITian

Joined: 27 Dec 2010

Posts: 1474

12 Feb 2012 00:12:18 IST

Like 0 people liked this

let tan^x = y.

then y^2 + 1/y^2 = 2

y^4 - 2y^2 + 1 = 0.

y^2 = 1.

y = +1 or y = -1.

so, y^100 + 1/y^100 = 2.

take either it will be the same :)

hemang

Blazing goIITian

Joined: 27 Dec 2010

Posts: 1474

12 Feb 2012 00:15:10 IST

Like 0 people liked this

edit :

in the first line it is y = tan²x

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

9396

20092

3672

2186

7617

2827

2638

Mathematics.

Chemistry.

Biology

Institutes

Parents

Board

Fun Zone