Important Maths Formulae for class 8,9,10

[midlife]

These are some important Maths formulas for students studying in class 8,9 and in CBSE, ICSE and state syllabus. For your board and terminal exams. .
Remember all these


(+/-+в+¢)²= +/-²+в²+¢²+2(+/-в+в¢+¢+/-)

1. (+/-+в)²= +/-²+2+/-в+в²
2. (+/-+в)²= (+/--в)²+4+/-в b
3. (+/--в)²= +/-²-2+/-в+в²
4. (+/--в)²= f(+/-+в)²-4+/-в
5. +/-² + в²= (+/-+в)² - 2+/-в.
6. +/-² + в²= (+/--в)² + 2+/-в.
7. +/-²-в² =(+/- + в)(+/- - в)
8. 2(+/-² + в²) = (+/-+ в)² + (+/- - в)²
9. 4+/-в = (+/- + в)² -(+/--в)²
10. +/-в ={(+/-+в)/2}²-{(+/--в)/2}²
11. (+/- + в + ¢)² = +/-² + в² + ¢² + 2(+/-в + в¢ + ¢+/-)
12. (+/- + в)³ = +/-³ + 3+/-²в + 3+/-в² + в³
13. (+/- + в)³ = +/-³ + в³ + 3+/-в(+/- + в)
14. (+/--в)³=+/-³-3+/-²в+3+/-в²-в³
15. +/-³ + в³ = (+/- + в) (+/-² -+/-в + в²)
16. +/-³ + в³ = (+/-+ в)³ -3+/-в(+/-+ в)
17. +/-³ -в³ = (+/- -в) (+/-² + +/-в + в²)
18. +/-³ -в³ = (+/--в)³ + 3+/-в(+/--в)

*ιη0 degrees =0
*ιη30 degrees = 1/2
*ιη45 degrees = 1/√2
*ιη60 degrees = √3/2
*ιη90 degrees = 1
¢σ* ι* σρρσ*ιт" σ' *ιη
т+/-η0 degrees = 0
т+/-η30 degrees = 1/√3
т+/-η45 degrees = 1
т+/-η60 degrees = √3
т+/-η90 degrees = ∞

¢σт ι* σρρσ*ιт" σ' т+/-η
*"¢0 degrees = 1
*"¢30 degrees = 2/√3
*"¢45 degrees = √2
*"¢60 degrees = 2
*"¢90 degrees = ∞
¢σ*"¢ ι* σρρσ*ιт" σ' *"¢


2*ιη+/-¢σ*в=*ιη(+/-+в)+*ιη(+/--в)
2¢σ*+/-*ιηв=*ιη(+/-+в)-*ιη(+/--в)
2¢σ*+/-¢σ*в=¢σ*(+/-+в)+¢σ*(+/--в)
2*ιη+/-*ιηв=¢σ*(+/--в)-¢σ*(+/-+в)
*ιη(+/-+в)=*ιη+/- ¢σ*в+ ¢σ*+/- *ιηв.

>> ¢σ*(+/-+в)=¢σ*+/- ¢σ*в - *ιη+/- *ιηв.
>> *ιη(+/--в)=*ιη+/-¢σ*в-¢σ*+/-*ιηв.
>> ¢σ*(+/--в)=¢σ*+/-¢σ*в+*ιη+/-*ιηв.
>> т+/-η(+/-+в)= (т+/-η+/- + т+/-ηв)/ (1'т+/-η+/-т+/-ηв)
>> т+/-η(+/-'в)= (т+/-η+/- ' т+/-ηв) / (1+ т+/-η+/-т+/-ηв)
>> ¢σт(+/-+в)= (¢σт+/-¢σтв '1) / (¢σт+/- + ¢σтв)
>> ¢σт(+/-'в)= (¢σт+/-¢σтв + 1) / (¢σтв' ¢σт+/-)
>> *ιη(+/-+в)=*ιη+/- ¢σ*в+ ¢σ*+/- *ιηв.
>> ¢σ*(+/-+в)=¢σ*+/- ¢σ*в +*ιη+/- *ιηв.
>> *ιη(+/--в)=*ιη+/-¢σ*в-¢σ*+/-*ιηв.
>> ¢σ*(+/--в)=¢σ*+/-¢σ*в+*ιη+/-*ιηв.
>> т+/-η(+/-+в)= (т+/-η+/- + т+/-ηв)/ (1'т+/-η+/-т+/-ηв)
>> т+/-η(+/-'в)= (т+/-η+/- ' т+/-ηв) / (1+ т+/-η+/-т+/-ηв)
>> ¢σт(+/-+в)= (¢σт+/-¢σтв '1) / (¢σт+/- + ¢σтв)
>> ¢σт(+/-'в)= (¢σт+/-¢σтв + 1) / (¢σтв' ¢σт+/-)
+/-/*ιη+/- = в/*ιηв = ¢/*ιη¢ = 2я
>> +/- = в ¢σ*¢ + ¢ ¢σ*в
>> в = +/- ¢σ*¢ + ¢ ¢σ*+/-
>> ¢ = +/- ¢σ*в + в ¢σ*+/-
>> ¢σ*+/- = (в² + ¢²' +/-²) / 2в¢
>> ¢σ*в = (¢² + +/-²' в²) / 2¢+/-
>> ¢σ*¢ = (+/-² + в²' ¢²) / 2¢+/-
>> " = +/-в¢/4я
>> *ιηΘ = 0 т1/2"η,Θ = η
>> *ιηΘ = 1 т1/2"η,Θ = (4η + 1) /2
>> *ιηΘ ='1 т1/2"η,Θ = (4η' 1) /2
>> *ιηΘ = *ιη+/- т1/2"η,Θ = η ('1)^η+/-

1. *ιη2+/- = 2*ιη+/-¢σ*+/-
2. ¢σ*2+/- = ¢σ*²+/- ' *ιη²+/-
3. ¢σ*2+/- = 2¢σ*²+/- ' 1
4. ¢σ*2+/- = 1 ' *ιη²+/-
5. 2*ιη²+/- = 1 ' ¢σ*2+/-
6. 1 + *ιη2+/- = (*ιη+/- + ¢σ*+/-)²
7. 1 ' *ιη2+/- = (*ιη+/- ' ¢σ*+/-)²
8. т+/-η2+/- = 2т+/-η+/- / (1 ' т+/-η²+/-)
9. *ιη2+/- = 2т+/-η+/- / (1 + т+/-η²+/-)
10. ¢σ*2+/- = (1 ' т+/-η²+/-) / (1 + т+/-η²+/-)
11. 4*ιη³+/- = 3*ιη+/- ' *ιη3+/-
12. 4¢σ*³+/- = 3¢σ*+/- + ¢σ*3+/-

>> *ιη²Θ+¢σ*²Θ=1
>> *"¢²Θ-т+/-η²Θ=1
>> ¢σ*"¢²Θ-¢σт²Θ=1
>> *ιηΘ=1/¢σ*"¢Θ
>> ¢σ*"¢Θ=1/*ιηΘ
>> ¢σ*Θ=1/*"¢Θ
>> *"¢Θ=1/¢σ*Θ
>> т+/-ηΘ=1/¢σтΘ
>> ¢σтΘ=1/т+/-ηΘ
>> т+/-ηΘ=*ιηΘ/¢σ*Θ

These r all d formulae of Maths for classes
9th,10th,11th,12th

[sca1een]

thanks fr sharing

[dpmiindia1]

Thanks for sharing these useful formula.

[hemangverma]

Thanks for sharing the useful information about math’s formulae for class 8,9,10

[Lord Diljit Rana]

Thanks For information