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Trignometry

Scorching goIITian

Joined:	1 Nov 2007
Post:	218

5 Apr 2008 15:54:32 IST

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Q.sin2A sec2A

----------- *-------------=?

secA+1 sec2A+1

1.cotA/2

2.tanA/2

3.sinA/2

4.cosA/2

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Comments (2)

Rahul Raghavendra

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Joined: 9 Jan 2008

Posts: 843

5 Apr 2008 15:58:47 IST

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2. $\tan{\frac{A}{2}}$

ashish banga

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Joined: 16 Dec 2006

Posts: 1362

5 Apr 2008 16:01:56 IST

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tan A/2
sin2A/ secA +1 = 2 tanA/2 cos^2 A
and secA/ secA +1 = 1/ 2cos^2A

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