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PERCENTAGES CONCEPTS,FORMULAS,DEFINITIONS,EXAMPLES,TRICKS

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    PERCENTAGES is very important chapter for all  competitive  exam and everything is included in it like all Problems on percentages,  fractions and percentages, price change,result and population,results on depreciation,comparison of percentages,successive increase and decrease etc. Percentages The Percentage is a fraction whose denominator is always 100. The percentage sign is %. Example -   7% can be converted to a fraction as 7/100 = 0.07   If, we want to calculate P% of Q, then    Percentage Formula:-      P% of Q =  Q× P/100 Qes.  If 30% of x = 60, then find the value of P. Soln .      x × 30/100 = 60 ⇒ x = 60 × 100/30 ⇒ x = 200. Fractions and Percentages To express Y % as a fraction,    Y% = Y/100   As -  30% = 30/100 = 3/10          98% = 98/100 = 49/50 To Express X/Y as a percentage we can say,   X/Y = (X/Y × 100) % ...
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TRIGONOMETRY FORMULAS

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TRIGONOMETRY FORMULAS:-
(1)sin()cos()tan() and opposite value
3FORMULA OF Sin(A+B,A-B)
Cos(A+B,A-B)
Tan(A+B,A-B)
2SinA.Cosb
2CosA.SinB
2Sina.Sinb
2Cosa.Cosb
 ETC.
FORMULA OF 
SinASin2ASin4A,
CosACos2ACos4A
TanATan2BTan4B
SinC+SinD
SinC-SinD
CosC+CosD
CosC-CosD
Sin2A,Cos2A,Tan^2A,
Sin3A,Tan3A etc.
Sin,Cos,Tan,cot,sec,cosec(+theta,-theta)
Sin,Cos,Tan,Cot,Sec,Cosec(90+theta,90-thet,180+theta,180-theta,270+theta,270-theta,360+theta,360-theta)

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