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sin 25°Cos 65°+cos 25°sin 65°

Posted by Kishan Das 1 year, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Mridupawan Patiri 1 year, 5 months ago

sin(90°-65°) cos 65°+cos(90°-65°) sin65° cos65°cos65°+sin65°sin65° (sin(90°-a) =cosa) (cos(90-a) =sina)

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Find the roots of the following quadratic equations, if they exist, by the mathod of completing the square: 2x2+x+ 4=0

Posted by Dharani Dharan 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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Prove that 16+17√3 is an irrational number

Posted by Jyoti Yadav 1 year, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Khwahis Parveen 1 year, 5 months ago

Let 16+17√3 be rational and let it's simplest form be p/q where p and q are integers and q≠0. Then, 16+17√3=p/q 17√3=p/q – 16 √3=p/q–16/17 …(i) Now, p/q is rational →(p/q–16/17) is rational [… difference of rational is rational] √3 is rational … from (i) The contradiction arises by assuming that √3 is rational. Hence, 16+17√3 is irrational.

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Determine by drawing graph whether the following pair of linear equations has a unique solution or not 3x+4y=12;y=2

Posted by Pranay Adaveni 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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If alfa and bita are the zeroes of the quadratic polynomial X power 2 - 5x + 4 find a quadratic polynomial having zeroes alfa +1/bita and bita + 1/ alfa

Posted by Krati Jain 1 year, 5 months ago

CBSE > Class 10 > Mathematics

0 answers

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Prove that the following are irrational numbers a. √2+√5 b. 5-3√2 c. √13

Posted by Shashank Sain 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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Prove that the following are irrational. (1)1/

Posted by Swati Kumari 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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Solve for elmination a1x +b1y+ c1=0 and a2x+b2y+c2=0

Posted by Aadya Gahlot 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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If in any decreasing AP sum of all terms except first is -36 and sum of all terms except last is 0 ,difference of tenth and sixth term is -16 then first term is

Posted by Preeti Aggarwal 1 year, 5 months ago

CBSE > Class 10 > Mathematics

0 answers

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X+y =14

Posted by Eklavya Sony 1 year, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Ajay Kumar Sahu 1 year, 5 months ago

Let Y=0,0+X=14 x=14

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Janeesh Kumar 1 year, 5 months ago

X+y=14 Let x=0 0+y=14 Y=0-14 Y=-14

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Revati Shegaonkar 1 year, 5 months ago

RRR

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Prove that 1 √6 +5 an irrational number.

Posted by Aachal Kumari 1 year, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Anmol Kaur 1 year, 5 months ago

Let the 1√6+5 is rational number . 1√6+5=p/q 1√6=p/q-3 1√6=p/q-3q √1=p-3q/2q L.H.S = irrational number R.H.S = rational number L.H.S =|= R.H.s Our supposition is wrong . 1√6+5 is not rational number . 1√6+5 is an irrational number .

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The altitude of a right triangle is 7cm less than it base. If the hypotenuse is 13cm, find the other two side.

Posted by Utkarsh Shukla 1 year, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Anjali Kumari 1 year, 5 months ago

1200

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Ram Yadav 1 year, 5 months ago

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24÷2×100

Posted by Yugendra X 1 year, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Khwahis Parveen 1 year, 5 months ago

24÷2×100 →12×100 →1200(answer)

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Ladli Kasaudhan 1 year, 5 months ago

1200

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Anjali Kumari 1 year, 5 months ago

1200

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A fraction becomes 1/3 when 1 is subtracted from the numerator and it becomes 1/4 when 8 is added to its denominator. Find the fraction

Posted by Ayaan Reza 1 year, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Jaat Jaat 1 year, 5 months ago

The first equation: x-1/y =1/3 Do the cross multiplication It become: 3x-3= y 3x-y=3 (first equation) The second equation: x/y+8=1/4 Do the cross multiplication It become: 4x=y+8 4x-y=8 (second equation) Then solve it with elimination or substitution method.

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Solve: 1/2x+1/3y=2, 1/3x+1/2y=13/6

Posted by Ayaan Reza 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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Classify the following numbers as prime or composite: 29×31-31 43x47 7x4+1

Posted by Srishti Chauhan 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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the roots of the equation X^2-3x-(m+2)(m+3) = 0 where m is a constant , are

Posted by Anmol Kaur 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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the area of a rectangle gets reduced by 80 square units of its length is reduced by 5 units and breadth is increased by 2units if we increased the length 10 units and decrease the breadth by 5units. the area is increased 50 square units find length and breadth of a rectangle

Posted by Chinmayanand A Benal 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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Find the LCM of 23×32 and 22×33

Posted by Khan Sherwani 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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X^2 +xk-k=3 find k

Posted by ... .... 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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Represented the following pair of linear equations graphically and have comment of conditions of consistency of this pair x-5y=6,2x-10y=12

Posted by Abhay Suresh 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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THE HCF of smallest composite number and the smallest prime number

Posted by Yash Singh 1 year, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Ladli Kasaudhan 1 year, 5 months ago

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L.V.A Naidu 1 year, 5 months ago

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Harshit Kesarwani 1 year, 5 months ago

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Ex 1.2 q 2

Posted by Anjali Kumari 1 year, 5 months ago

CBSE > Class 10 > Mathematics

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Find the hcf of 12 and 14

Posted by Ansh Bajpai 1 year, 5 months ago

CBSE > Class 10 > Mathematics

5 answers

Khwahis Parveen 1 year, 5 months ago

HCF of 12 and 14 12=2×2×3 14=2×7 (In both 2 is common so HCF is 2)

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Ladli Kasaudhan 1 year, 5 months ago

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L.V.A Naidu 1 year, 5 months ago

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Sakshi Kolekar 1 year, 5 months ago

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Sachin Rajpoot 1 year, 5 months ago

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What is the hcf of 3000 and 525

Posted by Tanishk Chauhan 1 year, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Sakshi Kolekar 1 year, 5 months ago

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Tanishk Chauhan 1 year, 5 months ago

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If 4 tan theta is equal to 3 then cos square theta minus sin square theta is =?

Posted by Vinayak Saim,Vii-B,25 1 year, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Sachin Rajpoot 1 year, 5 months ago

7/25

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Prove √2is irrational

Posted by Pabi Hadisda 1 year, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Sakshi Kolekar 1 year, 5 months ago

Let , √2 is rational number √2=a,b(a,b,are coprime) √2b=a Squaring on both sides (√2b²)=a² 2b²=a²—1 b²=a²/2 'a²'is divisible by '2' 'a' is divisible by '2' a/2=m a=2m Putting in eq 1 2b²=a² 2b²=(2m)² 2b²=4m² b²=4m²/2 b²=2m² b²/2=m² m²= b²/2 'b²'is divisible by '2' 'b'is divisible by '2' But,a and b are coprime Our assumption was wrong Therefore, √2 is irrational number

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Exercise 5.2 Q no 3

Posted by Naman Shahdeo 1 year, 5 months ago

CBSE > Class 10 > Mathematics