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deepaksoniGuru

Asked: March 11, 2021In: ICSE

An aircraft is flying at a constant height with a speed of 360 km/h. From a point on the ground, the angle of elevation of the aircraft at an instant was observed to be 45. After 20 seconds, the angle of elevation was observed to be 30. Determine the height at which the aircraft flying. (use √3 = 1.732)

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sir this is the important question from the book -ML aggarwal( avichal publication) class 10th , chapter20 , heights and ...Read more

deepaksoniGuru

Asked: March 16, 2021In: ICSE

(i) (1 + tan A)/ sin A + (1 + cot A)/ cos A = 2 (sec A + cosec A) (ii) sec4 A – tan4 A = 1 + 2 tan2 A

This is an important question from the Book- ML Aggarwal Board- ICSE Publication- Avichal Chapter- Trigonometric Identities Chapter number-18 We have ...Read more

deepaksoniGuru

Asked: March 16, 2021In: ICSE

A two digit number contains the bigger at ten’s place. The product of the digits is 27 and the difference between two digits is 6. Find the number.

This question has been taken from Book:- ML aggarwal, Avichal publication, class10th, quadratic equation in one variable, chapter 5, exercise ...Read more

deepaksoniGuru

Asked: March 16, 2021In: ICSE

(i) The sum of the ages of Vivek and his younger brother Amit is 47 years. The product of their ages in years is 550. Find their ages. (ii) Paul is x years old and his father’s age is twice the square of Paul’s age. Ten years hence, the father’s age will be four times Paul’s age. Find their present ages.

This question has been taken from Book:- ML aggarwal, Avichal publication, class10th, quadratic equation in one variable, chapter 5, exercise ...Read more

deepaksoniGuru

Asked: March 18, 2021In: ICSE

If k + 3, k + 2, 3k – 7 and 2k – 3 are in proportion, find k.

This is an important ques from the Book ML Aggarwal class 10th,, chapter – 7, ratio and proportion. Here four numbers ...Read more

deepaksoniGuru

Asked: March 19, 2021In: ICSE

Using the properties of proportion, solve the following equation for x; given x³+3x/3x²+1=341/91

This is an important ques from the Book ML Aggarwal class 10th,, chapter – 7, ratio and proportion. We have been ...Read more

deepaksoniGuru

Asked: March 26, 2021In: ICSE

Question 13. (a) In the figure (i) given below, AB is a diameter of a circle with centre O. AC and BD are perpendiculars on a line PQ. BD meets the circle at E. Prove that AC = ED. (b) In the figure (ii) given below, O is the centre of a circle. Chord CD is parallel to the diameter AB. If ∠ABC = 25°, calculate ∠CED.

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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(i) (1 + tan A)/ sin A + (1 + cot A)/ cos A = 2 (sec A + cosec A) (ii) sec4 A – tan4 A = 1 + 2 tan2 A

A two digit number contains the bigger at ten’s place. The product of the digits is 27 and the difference between two digits is 6. Find the number.

If k + 3, k + 2, 3k – 7 and 2k – 3 are in proportion, find k.

Using the properties of proportion, solve the following equation for x; given x³+3x/3x²+1=341/91