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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: raja ka khjana " formula of maths "
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kapil_007 (31)

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hi,
           i have a trick .i want to colect all formulas of maths.after colecting we can revise formulas fast becouse all are in queu.send me formulas and get saluts.
            i start with smallest formula of trigonometry--sina+cosa=1  
    
akhil_o (2709)

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plz put the squares man!

" Always remember money isn't everything but make sure you have made a lot of it before talking such nonsense!"
- Bill Gates
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crack (385)

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cosec^2=1+cot2  
sin 2 =2 sin  cos
sec^2=1+tan^2
 

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crack (385)

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better the rate better the formula......lol......isn't it

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saketsahoo (70)

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sin(a+b)=sinacosb+sinbcosa


people are made for love and machines for use, but unfortunately nowadays machines are being loved and people are used.
check out my new blog on www.sakettheindividualist.blogspot.com
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dream (571)

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cos(a+b) = cosa.cosb-sinasinb


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LAMPARD (1142)

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tan(a+b)={tan(a)+tan(b)}/{1-tan(a)tan(b)}

MaNuTd RoXxXx..MaNuTd 2 WiN PrEmIeR LeAgUe ThIs SeAsOn ToO AlOnG WiTh ChAmPiOnS LeAgUe.....HaiL RoNaLdO ...HaiL LaMpArD...
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nik_gup (196)

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sin3A = 3 sinA - 4sin^3 A
 

Curiosity is not a sin,but we should exercise caution with our curiosity.
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SINDHU_BR (36)

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Probability of an event(E) = number of outcomes favourable to E/ Total number of outcomes

ONE OUNCE OF PRACTICE IS WORTH TWENTY THOUSAND TONS OF BIG TALK.

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crack (385)

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arthemetic progeressions

1>Tn=a+(n-1)d
2>Sn=n/2(2a+(n-1)d)

gometric progressions
An=a*r^n-1
Sn=a[1-r^n]/1-r
geometric mean=root of ab

arthemetic mean=a+b/2

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learner (389)

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In triangle ABC,
sinA/a=sinB/b=sinC/c
a^2=b^2+c^2-2bccosA
a=bcosC + c cosB
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learner (389)

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In any triangle ABC,
tan((B-C)/2) = (cotA/2)*(b-c)/(b+c)
Similarly,
tan(A-B)/2 = (cot(C/2)*(a-b)/(a+b)
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learner (389)

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Area of a triangle ABC = 0.5bc*sinA =0.5ac*sinB =0.5ab*sinC
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foreversmilinganu (60)

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eqn of line passing thru origin is
y=mx where m is the slope

eqn of line having y intercept "C" is y=mx+c

eqn of line passing thru 2 pts (x1,y1) and (x2,y2) is(y-y1)/(y2-y1)=(x-x1)/(x2-x1)



gud luck!!

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SINDHU_BR (36)

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