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Trig question

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Ghost Of Highbury:
@nid - 2tan2x = 2sin2x/cos2x not 2sin2x/2cos2x

1) 2tan2x cos x = 3
    
first simplify this to..

2sin2x/cos x = 3

cross multiply to get

3 cos x = 2sin2x
3cos x - 2sin2x = 0

-2 sin2x = 2cos2x - 2

so it becomes... 3cos x + 2cos2x -2 =0
    
hence proved..

nid404:
oh yes....no wonder.....silly error
ho gaya....question solved

Eamyzz:

--- Quote from: Eamyzz on October 14, 2009, 02:06:00 am ---
huh???
dnt get ur pt

--- End quote ---



oooooh gt it  :-[ ::)
Thanks

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