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

Trignometry

Hot goIITian

Joined:	23 Nov 2008
Post:	156

6 May 2009 23:39:13 IST

0 People liked this

429

Inverse Trigonometry Doubt

None

x belongs to (1, ) then

1) 2 Tan^-1x 2) - pi + 2 Tan^-1x 3) pi + 2 Tan^-1x 4) None

Share this article on:

Comments (2)

taran

Blazing goIITian

Joined: 17 Nov 2008

Posts: 1331

6 May 2009 23:48:18 IST

Like 2 people liked this

put x =tanc

as x belongs to (1, infinity)

so it implies

c belongs to (pie/4 , pie/2)

the given xpression now becomes

now c(pie/4,pie/2)

so 2c(pie /2 , pie)

now u cant directly write as 2c because the answer will not lie in the range of tan inverse x which is minus pie/2 to plus pie /2

so subtarct pie from the answer to get 2c inthe range minus pie/2 to zero which is well under the reqd range ie( -pie /2 , pie)

so answer is 2)

Jammalamadaka

Hot goIITian

Joined: 23 Nov 2008

Posts: 156

6 May 2009 23:51:06 IST

Like 0 people liked this

Thank you.

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