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deepaksoniGuru

Asked: March 17, 2021In: ICSE

Arrange the following ratios in ascending order of magnitude: 2: 3, 17: 21, 11: 14 and 5: 7

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This is a basic question from ML aggarwal book of class 10th, chapter 7, ratio and proportion., ICSE board In this ...Read more

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deepaksoniGuru

Asked: March 18, 2021In: ICSE

If a, b, c and d are in proportion, prove that: (i) (5a + 7v) (2c – 3d) = (5c + 7d) (2a – 3b) (ii) (ma + nb): b = (mc + nd): d (iii)(a4 + c4): (b4 + d4) = a2c2: b2d2 (iv)(a2+ab) /(c2+cd) =(b2-2ab)/(d2-2cd) (v) (a+c)3 /(b+d) 3=a(a-c) 2/(b(b-d)2 (vi) a2+ab+b2/a2-ab+b2=c2+cd+d2/c2-cd+d2 (vii) (a2+b2) /(c2+d2) =ab+ad-bc/bc+cd-ad) (viii) abcd(1/a2+1/b2+1/c2+1/d2)=a2+b2+b2+c2)

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This is a basic question from ML aggarwal book of class 10th, chapter 7, ratio and proportion., ICSE board If a, ...Read more

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deepaksoniGuru

Asked: March 25, 2021In: ICSE

If O is the centre of the circle, find the value of x in each of the following figures (using the given information):

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This is circle based question from Chapter name- circles Topic – Angle properties of circles Chapter number- 15 In this question ...Read more

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deepaksoniGuru

Asked: March 26, 2021In: ICSE

Ques 20(b) In the figure (ii) given below, chords BA and DC of a circle meet at P. Prove that: (i) ∠PAD = ∠PCB (ii) PA. PB = PC . PD.

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This is an important and exam oriented question from Chapter name- circles Topic – Angle properties of circles Chapter number- ...Read more

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deepaksoniGuru

Asked: April 5, 2021In: ICSE

Question 9. (a) If a, b, c are the sides of a right triangle where c is the hypotenuse, prove that the radius r of the circle which touches the sides of the triangle is given by r=(a+b-c)/2

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One of the most important and exam oriented question from Chapter name- circles Topic – Angle properties of circles Chapter ...Read more

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deepaksoniGuru

Asked: April 17, 2021In: ICSE

Question 34. Two chords AB, CD of a circle intersect externally at a point P. If PA = PC, Prove that AB = CD.

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One of the most important and exam oriented question from Chapter name- circles Topic – Angle properties of circles Chapter ...Read more

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deepaksoniGuru

Asked: May 9, 2021In: CBSE

Problem 2: Show that the sequence defined by an = 3n2 – 5 is not an A.P.

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This is the basic and conceptual question from Chapter name- Arithmetic Progression Chapter number- 9 Exercise 9.2 In this question ...Read more

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Arrange the following ratios in ascending order of magnitude: 2: 3, 17: 21, 11: 14 and 5: 7

If O is the centre of the circle, find the value of x in each of the following figures (using the given information):

Ques 20(b) In the figure (ii) given below, chords BA and DC of a circle meet at P. Prove that: (i) ∠PAD = ∠PCB (ii) PA. PB = PC . PD.

Question 9. (a) If a, b, c are the sides of a right triangle where c is the hypotenuse, prove that the radius r of the circle which touches the sides of the triangle is given by r=(a+b-c)/2

Question 34. Two chords AB, CD of a circle intersect externally at a point P. If PA = PC, Prove that AB = CD.

Problem 2: Show that the sequence defined by an = 3n2 – 5 is not an A.P.