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Trignometry

Scorching goIITian

Joined:	1 Nov 2007
Post:	218

5 Apr 2008 15:52:03 IST

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274

MASMA(multiple n submul.....)

None

Q.If 8sin

cos

cos2

cos4

=sinx then x=?

1.16theta

2.8theta

3.4 theta

4.32theta

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smart_boy198062

Scorching goIITian

Joined: 12 Feb 2008

Posts: 205

5 Apr 2008 16:00:55 IST

Like 1 people liked this

8 sint cos t cos 2t cos 4t

= 4 sin2t cos 2t cos 4t

= 2 sin 4t cos 4t

= sin 8t

hence

x = 8 t = 8 theta = 2)

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