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Trignometry

Scorching goIITian

Joined:	1 Nov 2007
Post:	218

5 Apr 2008 15:47:19 IST

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261

Multiple and sub multiple angles!

None

Q.cotA - tanA -2tan2A -4tan4A=?

1.cotA

2.2cot2A

3.4cot4A

4.8cot8A

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smart_boy198062

Scorching goIITian

Joined: 12 Feb 2008

Posts: 205

5 Apr 2008 15:57:14 IST

Like 1 people liked this

use the concept

cot A- tan A=2cot 2A

using this it comes option 4
that is

8cot 8A

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