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Ask iit jee aieee pet cbse icse state board experts Expert Question: can we determine the values of sine or cos or tan func without using any table
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[Post New]3 Jun 2008 09:01:44 IST
    Subject: can we determine the values of sine or cos or tan func without using any table
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rahul_jain (0)

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is there any method to determine the values of sine or cos or tan func without using the sin table or any other table. an w determine it by any other geometrical method. please tell me about this even if it is a complecated.
    
[Post New]3 Jun 2008 10:58:55 IST
    Subject: Re:can we determine the values of sine or cos or tan func without using any table
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harsh.anurag (106)

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see the diagram


u just hav to remembr this figure alobg with the values


nw suppos u hav to find cos 30 so u look in the figur


it is BD/AB=X/2 /X=1/2


BINGO!!!!!!!!!!!!!!!!!!!!!


 


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[Post New]3 Jun 2008 11:10:33 IST
    Subject: can we determine the values of sine or cos or tan func without using any table
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harsh.anurag (106)

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hey i gt tht wrng
firstly cos 30 is AD/AB = ROOT 3x/2 /x = ROOT 3x /2

SECONDLY I THINK THIS IS NT YR ANS
U HAV ASKD FR FUNC
I HAV GIVEN U FORMULA FR SIMPLE TRIGO
I BEG YR PARDON
SORRY
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[Post New]3 Jun 2008 14:15:19 IST
    Subject: Re:can we determine the values of sine or cos or tan func without using any table
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iitkgp_bipin (6480)

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You should learn the standard values (sin, cos, tan of 00, 180, 300, 450, 600, 900) be heart.


For other values you need trigonometric tables or you can find them by taylor's series.


 


 
Bipin Kumar Dubey
Chemical Dept.
IIT Kharagpur

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[Post New]3 Jun 2008 18:04:17 IST
    Subject: can we determine the values of sine or cos or tan func without using any table
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swarit_08 (16)

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if you don't remember the smaller angle values, then you can also get it by using half angle formula.
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[Post New]4 Jun 2008 20:03:09 IST
    Subject: can we determine the values of sine or cos or tan func without using any table
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akshay.khare91 (585)

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learn the imp values and find other by using different formulae
IMPOSSIBLES ARE OFTEN UNTRIED...
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[Post New]4 Jun 2008 20:18:06 IST
    Subject: can we determine the values of sine or cos or tan func without using any table
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crack (385)

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i remeber all the basic trigo function using the method give by harsh....
and i agree with bipin.....
you need to know the values by heart........
the complicated trigo values like 23 degrees shd be found out using the tables or .....you can always opt foe a calculator...lol
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