CBSE > Class 11 > Mathematics | CBSE Board | Homework Help

Let x letre water to be added then total mixure =(1125) The resulting mixure will contain more than 25% but less than 30% =30% of( x+1125)>45%of1125 -(1) And25%of (x+1125)<45%of 1125 -(2) (1) equation Now 30/100(x+1125)>45/100(1125) =30x +33750>50625 =30x>50625-33750 =30x>16875 =x >562.5 Now equation (2) 25% of(x +1125)< 45% of 1125 =25/100(x +1125)< 45/100(1125) =25x +28125 < 50625 =25x < 50625-28125 =25x < 22500 =x <900 The water will be added more than 562.5 letres and less than 900 letres

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Passing through (2,2√3) and inclined with the x- axis at an angle of 75°

Posted by Mahi Desai 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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what is number

Posted by Amit Pal 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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Secsqx+cosecsqx>4

Posted by Satyam Mishra 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Mohit Rao 7 years, 3 months ago

1+tansqx+1+cotsqx equal to 2+tansqx+cotsqx now adding and subtracting 2 2+2+ tansqx +cotsqx-2 is equal to 4+(tansqx-cotsqx) hence proooved 4+something positive

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If cos(a+b)=4÷5 and sin (a-b)5÷13, where 'a' lies between 0 and 45degree ,find the value of tan2a.

Posted by Utkarsh Singh 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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How to find domain and range of a functions

Posted by Taneeshq Chauhan 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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ch 1 miscellaneous exercise question no. 2,3,6,13,16

Posted by Anam Khan 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Anam Khan 7 years, 3 months ago

yes

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Utkarsh Singh 7 years, 3 months ago

Sets ke hai ye questions ??

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Prove that sin36sin72sin108sin144=5/16

Posted by Riya Yadav 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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What is geometric progression

Posted by Soumya Gupta 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Priyanshu Singh 7 years, 3 months ago

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If a+bi=c+i÷c-i where a,b,c are real prove that a²+b²=1 and b÷c = 2c÷ c²-1.

Posted by Kashish Kumari 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Sikander Ram 7 years, 3 months ago

Csquare-1

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Exercise 2.1 1st question

Posted by A.S.Rajpoot Rajpoot 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Shivshant Upadhyay 7 years, 3 months ago

(x/3+1=5/3 and y--2/3=1/3) solve this.

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1-cos2x÷1+cos2x

Posted by Sindhu Sree 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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(a+b)2=

Posted by Arpit Kumar 7 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Aman Kumar 7 years, 3 months ago

a^2+b^2+2ab..

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Prove that: sin5π\18-cos4π\9= √3sinπ\9

Posted by Anuradha Chhonkar 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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If the numbers a,b,c,d,e are in A.P,then the valuebof a-4d+6c-4d+e

Posted by Abitha Thangakumar 7 years, 3 months ago

CBSE > Class 11 > Mathematics

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Sahil Vishwakarma 7 years, 3 months ago

-2a+9d

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in an examination 80%students passed in mathematics 72% passed in science and 13%failed in both subjects if 312 students passed in both the subjects find total no. if students who appeared examination plss. Give ans fast.........!!!

Posted by Kapil Upadhyay 7 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Keshav Bindal 7 years, 3 months ago

Total 480 students appeared in examination

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Keshav Bindal 7 years, 3 months ago

Let x be no. of students appeared. A be set of students passed in Maths. B be set of students passed in Science. n(A) = 80x/100. n(B) = 72x/100. n(A intersection B) = 312. n(A U B) = (80x + 72x - 31200)/100 = (152x - 31200)/100. n(U) - n(A union B) = 13x/100. x - (152x - 31200)100 = 13x/100. x = (13x + 152x -31200)/100. 31200 = 165x - 100x. 65x = 31200. x = 480. Ans.

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find value of cos inverse 1/2[sin inverse 2x/1+x^2+sin inverse 1-x^2/1+x^2]

Posted by Ritika Kholia 7 years, 3 months ago

CBSE > Class 11 > Mathematics