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Author Topic: Trig question  (Read 2662 times)

Offline coolcar221

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Trig question
« on: October 06, 2009, 11:35:13 pm »
Show that the equation 2tan2xcosx=3 can be written in the form 2cos2x+3cosx-2=0
« Last Edit: October 07, 2009, 02:09:02 pm by coolcar221 »
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nid404

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Re: Trig question
« Reply #1 on: October 07, 2009, 07:57:24 am »
will answer when I'm back from my classes
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Offline astarmathsandphysics

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Re: Trig question
« Reply #2 on: October 07, 2009, 09:31:36 am »
Quote from: coolcar221 on October 06, 2009, 11:35:13 pm
Show that the equation 2 tan2x cosx = 3 can be written in the form 2 cos2x + 3cosx - 2 = 0
Can you check the question?
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nid404

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Re: Trig question
« Reply #3 on: October 07, 2009, 09:34:42 am »
i was wondering.....yes can u please check the question again
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Offline cel

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Re: Trig question
« Reply #4 on: October 07, 2009, 03:33:27 pm »
hi..
u jst have to substitute tan2x=sec2x in the eqn
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Offline astarmathsandphysics

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Re: Trig question
« Reply #5 on: October 07, 2009, 03:50:05 pm »
Tan2x is not equal to sec2x
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Offline Ghost Of Highbury

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Re: Trig question
« Reply #6 on: October 07, 2009, 03:50:52 pm »
lol..:P
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Offline Eamyzz

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Re: Trig question
« Reply #7 on: October 07, 2009, 04:12:06 pm »
hey all  ;D ;D ;D
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Offline Ghost Of Highbury

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Re: Trig question
« Reply #8 on: October 07, 2009, 04:13:56 pm »
hey eamyz!
welcome back!
wrong topic though...:P

try posting in the chit chat sectin...u'll be welcomed with warm hands!!!!
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Offline Eamyzz

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Re: Trig question
« Reply #9 on: October 07, 2009, 04:15:48 pm »
hahahahaa....i no i couldnt resist nt writing  ;D ;D ;D
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Offline Eamyzz

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Re: Trig question
« Reply #10 on: October 07, 2009, 04:23:36 pm »
wat is sec2x ???
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Offline Ghost Of Highbury

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Re: Trig question
« Reply #11 on: October 07, 2009, 04:35:05 pm »
sec^2 x = (1/cos^2x)
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Offline Eamyzz

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Re: Trig question
« Reply #12 on: October 07, 2009, 04:36:48 pm »
Quote from: eddie_adi619 on October 07, 2009, 04:35:05 pm
sec^2 x = (1/cos^2x)


is this hw u write it here or its written like this evrywhere??
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Offline Ghost Of Highbury

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Re: Trig question
« Reply #13 on: October 07, 2009, 05:05:38 pm »
huh?
didnt get u?
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Offline astarmathsandphysics

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Re: Trig question
« Reply #14 on: October 07, 2009, 05:25:41 pm »
That equation for sec^2x is right
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