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The angle of elevation of the top of the tower from two points A and B which are 15 m apart ,on the same side of the tower on the level ground are 30 degree and 60 degree respectively .find the height of the tower and distance of point B from the base of the tower take under root 3= 1.732

Posted by Anupreet Kaur 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Vanshika Chhillar 6 years, 1 month ago

In triangle ADC tan60°=CD/AD =>√3=CD/AD =>AD=CD/√3. .......(1) In ∆ BDC tan30°=CD/AD+AB =>1/√3=CD/AD+15 =>AD=√3CD-15. ..........(2) Comparing (1) and (2), Do it yourself The answer would come out to be 12.99 m.

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A dealer sells a toy for 24 ruppes and gains as much percent as the cost price of the toy. (i)find the cost price of the toy. Which mathematical concept is used in the above problem?

Posted by Yaswanth Chaudhari 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Diksha ? 6 years, 1 month ago

I think quadratic eqns

1Thank You

Shruti Gupta 6 years, 1 month ago

Which chapter is this from? Is it from 10th grade portion?

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ANSWER

If an angle between two tangents drawn from an external point p to a cicle of radius r and centre o is 60° then find the length of OP

Posted by Simranpreet Kaur 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Simranpreet Kaur 6 years, 1 month ago

Can you pls solve this

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Shruti Gupta 6 years, 1 month ago

OP = √3r

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ANSWER

Ab paper ane know h toh math ki practice karne ke liya kya kare

Posted by Isha Tyagi 6 years, 1 month ago

CBSE > Class 10 > Mathematics

4 answers

Isha Tyagi 6 years, 1 month ago

Thanks shruti for helping me. Are you nervous for board exam. App kitne percencent number lana chate ho. Can we be friend.

1Thank You

Shruti Gupta 6 years, 1 month ago

Basic ho ya standard ho, NCERT textbook karlo. Examiners paper toh textbook ke questions ke concepts se hi lete hain. Bahar se toh kuch nahi aata, textbook karlo and you're good to go.

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Simranpreet Kaur 6 years, 1 month ago

And for standard maths kya krna hoga ?

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Shruti Gupta 6 years, 1 month ago

Poori NCERT textbook ke exercises and examples parctice kar daalo atleast 2 baar toh kar hi lo poori textbook. Uske baad AGAR time ho toh pichle saal ke papers solve karlo. Bas itna kaafi hai. 90% above toh aa hi jayenge isse agar calculation mistakes na ho toh. All the best for your exams!!

2Thank You

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How we calculate 3(-√3y/√2-√8y)

Posted by Prakash Aakash 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The perimeters of two similar triangles ABC and PQR are 35cm and 45 cm respectively, then the ratio of the areas of the two triangles is___________________.

Posted by Simranpreet Kaur 6 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Arisha Zaidi 6 years, 1 month ago

49:81 is the correct answer.......

0Thank You

Kavitha M V 6 years, 1 month ago

7:9

1Thank You

Aadya Singh 6 years, 1 month ago

49:81

4Thank You

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Which maths is useful for exam for best marks

Posted by Js Jagsir 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Shruti Gupta 6 years, 1 month ago

I dont think you have the option to choose between basic and standard now because the subjects are already done with the registration. But yes, basic would be easier to score in but if you want to take maths as a subject in class 11, then you WILL have to opt for standard.

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Two concentric circles are of radii 5cm and 3cm.What is the length of the chord of the larger circle which touches the smaller circle? a.6cm b.8cm c.10cm d.12cm

Posted by Kavitha M V 6 years, 1 month ago

CBSE > Class 10 > Mathematics

8 answers

Ravi Choudhary 6 years, 1 month ago

Good luck ✌️for ur Board...Now its time to Accelerate ur learning and enjoy ur Friendly freedom.... ✌️

1Thank You

Ravi Choudhary 6 years, 1 month ago

For solving ur problem first draw a perpendicular line to the centre and make a rt triangle where two sides Hypotenuse= 5 & another side 3 given ,so now find out another side which fall on half chord thay may Come out to be 4 by rt triangle theorem then double this value u will get CHORD = 8 cm.... hope u may understand..... Thankyou.....

2Thank You

⚜??Brainly Buddy??⚜ 6 years, 1 month ago

Ohk

2Thank You

Shruti Gupta 6 years, 1 month ago

The person who asked that question was another Shruti and I answered it. I think there is another Shruti with the same surname ??

1Thank You

Shruti Gupta 6 years, 1 month ago

sin 18°? What about that?

0Thank You

⚜??Brainly Buddy??⚜ 6 years, 1 month ago

Shruti u got sin18?

1Thank You

⚜??Brainly Buddy??⚜ 6 years, 1 month ago

8 cm

1Thank You

Shruti Gupta 6 years, 1 month ago

b. 8cm

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In ∆ABC, DE//BC such that BC=8cm,AB=6cm and DA=1.5cm,then DE=_

Posted by Kavitha M V 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Manjunath Reddy N 6 years, 1 month ago

4cm

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⚜??Brainly Buddy??⚜ 6 years, 1 month ago

2cm

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The radius (in cm) of the largest right circular cone that can be cut out from a edge 4.2 cm is

Posted by Nishankisgreat ! 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The HCF Of 135 and 125

Posted by James Tons 6 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Garima Sharma 6 years, 1 month ago

0Thank You

Amaan Raza 6 years, 1 month ago

1Thank You

Aadya Singh 6 years, 1 month ago

3Thank You

ANSWER

What is the sum of all even integers between 2 and 495 in an AP ??

Posted by Garima Sharma 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Har Har Mahadev 🙏 6 years, 1 month ago

61,725

2Thank You

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What is the value of sin 18

Posted by Shruti Gupta 6 years, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

⚜??Brainly Buddy??⚜ 6 years, 1 month ago

Convert 18⁰ into radiant angke and use pythagoras theorem

0Thank You

Garima Sharma 6 years, 1 month ago

Cos(90°-18°)

1Thank You

Ádítî Chàûdhäry 6 years, 1 month ago

*cos(90°-18°)

1Thank You

Ádítî Chàûdhäry 6 years, 1 month ago

(90°-18°)

1Thank You

Shruti Gupta 6 years, 2 months ago

It isnt there in 10th syllabus but u can write it as cos (90°-18°)

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ANSWER

prove circle circumscribing a rectalgle is a square

Posted by Rakshita Hoogar 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Isha Tyagi 6 years, 1 month ago

First draw a circle under square give the point name a of square a,b,c,d and circle point p,q,r,s.as=aq1equation,bs =br2equation,dp=dq3equ,pc =pr 4equation. Reason tangent drawn from external point ate equal.by adding all the equation we have,ab+dc=ad+bc.so,ab=dcand ad =bc hence ab =ad which are the opposite side of square. Hence proved

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In an AP, the sum of first ten terms is -150 and the sum of its next ten terms is -550.Find the AP

Posted by Rashmitha Bangera989 6 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Dhruv Kakkar 6 years, 2 months ago

Given: Sum of first ten terms of an AP = -150 Sum of next ten terms of an AP =-550 To find: AP Solution: Sum of n terms of an AP Sum of first 10 terms -150 = 5(2a+9d) -150=10a+45d…..(i) Sum of next 10 terms -150-550=10(2a+19d) -700=10(2a+19d) -70=2a+19d …….(ii) Combining 1 and 2, we get Multiplying (ii) by 5 -350=10a+95d….(iii) Subtracting (i) from (iii) we get, -350+150=10a+95d-10a-45d -200=50d d=-4 substitute d=-4 in equation (i) we get -150=10a+45d -150=10a+45(-4) -150=10a-180 10a=-150+180 10a=30 a=3 hence, a=3 and d=-4 The AP will be a, a+d, a+2d, a+3d,… Then the AP will be 3, -1, -5, -9,…."

0Thank You

Dhruv Kakkar 6 years, 2 months ago

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Pratik Kaushal 6 years, 2 months ago

So .. Given that Sum of first 10 terms is -150 and of next 10 is -550 so S10 =-150 -150 = 10/2(2a+(10-1)d =2a+9d = -30 .....(1) And again given that sum of next ten terms is -550 So -150 +(-550) =-770 -770= 20/2(2a+(20-1)d) =2a+19d=-70......(2) By applying elimination b/w both We get 10d = -40 d= -4... Putting d=-4 in eq 1.... 2a+9(-4) = -30 2a-36 =-30 2a = 6 a = 3 So Ap would be .... 3 , -1,-5,-9,..... Hope it will help you :)..... Have a nice day !!

1Thank You

ANSWER

If 2under root 45 + 3 under root 20 upon 2 under root 5 on simplification give rational or irational

Posted by Vishal Dhama 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Aadya Singh 6 years, 2 months ago

It gives rational number and the answer is 6

1Thank You

ANSWER

If sin theta minus cos theta is 0 then find the value of sin4theta plus cos 4 theta

Posted by Jasspreet Kaur 6 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Rajnish Yadav 6 years, 2 months ago

8cos theta

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Rajnish Yadav 6 years, 2 months ago

Hiii

0Thank You

Sandy .N 6 years, 2 months ago

1Thank You

ANSWER

When ak sneez..the rest of people catch cold<font color=black><font size=3>

Posted by Ankesh ....... 6 years, 2 months ago

CBSE > Class 10 > Mathematics

34 answers

Rohan Stark 6 years, 1 month ago

I am agreeing with you Shruti.??

1Thank You

Shruti Gupta 6 years, 2 months ago

Its an app for studying and solving questions and doubts, not that you guys can't talk, but please talk or text on a private app that is meant for texting and not online studying platforms.

1Thank You

Ankesh ....... 6 years, 2 months ago

Ok....u also..bye..good night..sweet dream.tc

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Khushboo Singh 6 years, 2 months ago

it's ok... ak... take care good night

0Thank You

Rohan Stark 6 years, 2 months ago

Is this a chatting app? You Shitheads ???

2Thank You

Ankesh ....... 6 years, 2 months ago

Ruk to jata but...