CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

{tex}\begin{array}{l}\left(\frac{1-\mathrm{tanA}}{1-\mathrm{cotA}}\right)^2=\left(\frac{1-\mathrm{tanA}}{1-{\displaystyle\frac1{\mathrm{tanA}}}}\right)^2\\=\left(\mathrm{tanA}\frac{(1-\mathrm{tanA})}{\mathrm{tanA}-1}\right)^2\\=(-\mathrm{tanA})^2=\tan^2\mathrm A\end{array}{/tex}

0Thank You

ANSWER

the students of a school decided to beautify the school on the annual day by fixing colourful flags on the street passage of the school they have 27 flax to be fixed at intervals of every 2 metre the flags are stored at the position of the middle most flag Ruchi was given the responsibility of placing the flag Ruchi capital books where the flags forest road she could carry only one flag at a time how much distance did she cover in completing this job and returning back to collect her books

Posted by Rahul Singh 6 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Ram Kushwah 6 years, 10 months ago

Distance traveled in one side of middle flag

=2x(2+4+6,------------+26)

=2x2(1+2+3+...............+13)

=4x13*14/2= 364 m

total distance

left + right

= 2 x 364 = 728 m

0Thank You

Aliya Qureshi 6 years, 10 months ago

1512m

0Thank You

Rahul Singh 6 years, 10 months ago

Can anybody solve this question please

0Thank You

ANSWER

I have left triangles, trignometry and surface area and volumes...and rest of the chapters are fully prepared....will i be able to secure passing marks??? Help me please....

Posted by Samyukta ... 6 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Fatma Naayab 6 years, 10 months ago

triangle theorem n construction both were asked in 4 marks

1Thank You

Fatma Naayab 6 years, 10 months ago

prepare at least triangle theorem

1Thank You

Aman Ahammad K 6 years, 10 months ago

Study surface area and volumes it's important

1Thank You

ANSWER

Show that number of the from 14n , where n is a natural number can never end with digit zero

Posted by Parman Chahal 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Shabnam Khatun Naseem Ahamed Siddiqui 6 years, 10 months ago

If the number 14n ,for any n , were to end with zero , then it would be divisible by 5 . that is the prime factorization of 14 and would contain the prime 5 it is not possible because 14 n =[7]2n , show the only prime in the factorization of 14 and S7 so the uniqueness of the fundamental theorem of arithmetic guarantees that

0Thank You

ANSWER

1/x+1/y=1/z

Posted by Mili Mishra 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Ram Kushwah 6 years, 10 months ago

x,y,z=mishra

0Thank You

ANSWER

What is zeros of polynomial

Posted by Sindhu Lekshmy 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If zeroes of polynomial x3-3x2+x+1 are a-b, a, a+b, find a & b.

Posted by Vineeth Reddy 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Vineeth Reddy 6 years, 10 months ago

Get me answer..

0Thank You

ANSWER

How we can calculate hours into fraction

Posted by Sahil Rajput 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the sum of( 5+13+21+....+121)

Posted by Rohit Prajapati 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Ram Kushwah 6 years, 10 months ago

a=5,d=8 l=121

an=a+(n-1)d

121=5+(n-1)x8

116=8n-8

8n=124

n=124/8=15.5

So 121 cannot be term of this AP,So question is not correct(this is not an AP)

pl check question again

0Thank You

Rahul Singh 6 years, 10 months ago

1008

0Thank You

ANSWER

What is the unit place of 9n

Posted by Chirag Sharma 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Mr Manish Singh 6 years, 10 months ago

0Thank You

ANSWER

Let triangle ABC similar triangle DEF and there area be , respectively,64,121cmsquare if ef is equal 15.4 cm find BC

Posted by Satyanarayan Sharma In 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Ankit Kumar 6 years, 10 months ago

11.2

0Thank You

ANSWER

The ratio of the sum of n term of two Ap in (7 n+1):(4 n+27). Find the ratio of their m term

Posted by Nikhil Kumar 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Virat Jain 6 years, 10 months ago

7m+1:4m+27

0Thank You

ANSWER

DA and DB are the tangents drawn from D ro the circle with centre O.If angle ADO=40 .Find angle AOB

Posted by Devansh Aggarwal 6 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Ankit Kumar 6 years, 10 months ago

Answer is 100

0Thank You

Ankit Kumar 6 years, 10 months ago

Sorry this ans is incorrect

0Thank You

Ankit Kumar 6 years, 10 months ago

140

0Thank You

ANSWER

For which values of a and b does the following pair of linear equations have an infinite number of solutions? 2x+3y=7 (a-b)x + (a+b)y = 3a+b-2 Please solve this..

Posted by Amar Konwar 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Aliya Qureshi 6 years, 10 months ago

a = 5 , b = 1

0Thank You

Ankit Kumar 6 years, 10 months ago

B is 1 and a is 5

0Thank You

ANSWER

Nth term of formula

Posted by Jio Sim 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Aarohi Singh 6 years, 10 months ago

an = a + (n-1)d

1Thank You

ANSWER

Formulao chapter5

Posted by Jio Sim 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

At 7am lalit starts his journey from delhi on his motorcycle to ambala 285 kilometres away . He drives at a speed of 30km/h . At what time will he reach his dimension

Posted by Vatsal Kamlesh Vagrecha 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Miss Angel 6 years, 10 months ago

Time = Distance \speed

0Thank You

ANSWER

(2,3) (4,1)

Posted by Rutik Ohal 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

find the centre of circle passing through the points (6 -6), (3 -7) and (3 3).

Posted by Deepak Shukla 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Ayush Shukla???? 6 years, 10 months ago

U can find by mid point formula

1Thank You

ANSWER

secA+tanA=p find the value of cosecA

Posted by Mohit Rao 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Ankit Kumar 6 years, 10 months ago

Psq. + 1 upon psq._ 1

0Thank You

ANSWER

If sec theta + tan theta = P find value of cosec theta

Posted by Harjot Singh 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Deepanshu Mahajan 6 years, 10 months ago

LHS 1/cosA + sinA/cosA =p 1+sinA/cosA =p 1+sinA=pcosA 1+sinA=p√1-sin sqA Squaring both side (1+sinA )sq = p sq. (1 -sin sq.A) (1+sinA) (1+sinA) =p sq. (1-sin sq.A) (1+sinA) (1+sinA)/(1-sinA)(1+sinA) =p sq. {:.a sq.+b sq =(a+b)( a-b)} (1+sinA)/(1-sinA) = p sq. (1+sinA) =p sq.( 1 - sin A) 1 + sinA = p sq. -p sq sinA SinA + p sq.sinA = p sq-1 sin A (1 + p sq.) = p sq-1 Sin A = (p sq. -1)/(p sq+1) CosecA = (p sq.+1) / (p sq.-1) {sinA = 1/ cosecA} H.P

1Thank You

Deepanshu Mahajan 6 years, 10 months ago

SecA+tanA =p

1Thank You

ANSWER

If A,B and C are interior angles of triangle ABC,then show that cos(B+C/2)=sinA/2

Posted by Keerthi . 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Dpsc Singh 6 years, 10 months ago

A+B+C = 180° B+C=180°-A B+C/2=90°-A/2 Cos(B+C/2)=cos(90°-A/2) Cos(B+C/2)=sin(A/2) Hence proved

3Thank You

ANSWER

A boy observes that the angle of elevation

Posted by Ranveer Singh 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

Let O be the position of the bird and B be the position of the boy. Let FG be the building and G be the position of the girl.
In {tex}\triangle{/tex}OLB,
{tex}\frac { OL } { B O }= \sin 30 ^ { \circ }{/tex}
{tex}\Rightarrow \quad \frac { O L } { 100 } = \frac { 1 } { 2 }{/tex}
{tex}\Rightarrow{/tex} OL = 50 m
OM = OL - ML
= OL - FG
= 50 - 20 = 30 m
In {tex}\triangle{/tex}OMG
{tex}\frac {OM}{OG}=sin45°=\frac{1}{√2}{/tex}
OG = OM√2 = 30 √2 = 42.3 meter

0Thank You

ANSWER

Find quadratic polynomial whose sum and product of whose zerores are -3 and 2 respectively

Posted by Saksham Kapoor 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Devanshu Sharma 6 years, 10 months ago

Let the first zero be x And second be y A.T.Q x+y= -3 = -b upon a xy=2=c upon a We have a=1 , b=3 (because -b= -3 so b=3) and c =2 ax square +bx +c=0 X square +3x+2=0

4Thank You

Affu 😊 6 years, 10 months ago

x^2 + 3x + 2 ... Its too easy

2Thank You

ANSWER

Prove that three times the sum of the squares of the sides of a triangle is equal to the four times the sum of the square of the medians of the triangle.

Posted by Devanshu Sharma 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Devanshu Sharma 6 years, 10 months ago

This theorem is not in our syllabus

1Thank You

Rojan Sharma 6 years, 10 months ago

By Apollonius theorem

0Thank You

ANSWER

Find the number of solution of linear equations 2x-y=3 and 4x-y = 3

Posted by Deepali Rana 6 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Bro important 5 questions dooo plzzzz abhi sirf 80/60 percent marks ki hi practise hoiii hai plzzzzzz important question koii 5 dooo

Posted by Amaan @@# 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Chirayu . 6 years, 10 months ago

go through every example of NCERT

0Thank You

ANSWER

How to draw a ogive of less or more than type of data is given on the graph

Posted by Angel Vishakha 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Fatma Naayab 6 years, 10 months ago

calculate cumulative frequency then write less than upper limit similarly write all from class interval n put the value of cf bcoz in less than value is same as cf in more than type write lower limit of class interval n their value in 1st u can write to last c.f in only 1st then from 2nd just subtract the frequency no. from 1st , from 2nd value subtract 2nd of frequency n so on then u can draw easily

0Thank You

Devanshu Sharma 6 years, 10 months ago

Commulative frequency ko adjust krke less than or more than mein f bnake graph draw ki a jaenga

1Thank You

ANSWER

The annual profits

Posted by Angel Vishakha 6 years, 10 months ago

CBSE > Class 10 > Mathematics