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Class 9 Chapter 8 Exercise 8.1 Solutions

Q.1 The angles of quadrilateral are in the ratio 3 : 5 : 9 : 13. Find all the angles of the quadrilateral. Solution: Let the ratio between the angles be x. Therefore, the angles will ...

Class 9 Chapter 8 Quadrilaterals Exercise 8.2 Solutions

Q.1 ABCD is a quadrilateral in which P, Q, R and S are mid-points of the sides AB, BC, CD and DA (see Fig 8.29). AC is a diagonal. Show that :

Class 8 Linear Equations in One Variable Exercise 2.4 Solutions

1. Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8. The final result is 3 times her original number. Find the number. Solution:  Let the number be ...

Introduction to Trigonometry Exercise 8.1 Solution

1. In Δ ABC, right-angled at B, AB = 24 cm, BC = 7 cm. Determine : (i) sin A, cos A (ii) sin C, cos C Solution: = 25 2. In Fig. 8.13, find tan P – cot R Solution: By pythagoras ...

Introduction to Trigonometry Exercise 8.3 Solution

1. Evaluate : (i) Solution:  (ii) Solution:   (iii) Solution:  =  = 0 (iv) Solution: =   = 0 2. Show that : (i) tan 48° tan 23° tan 42° tan 67° = 1 (ii) cos 38° cos ...

Introduction to Trigonometry Exercise 8.4 Solutions

1. Express the trigonometric ratios sin A, sec A and tan A in terms of cot A. Solution: Since = = Now = = = and 2. Write all the other trigonometric ratios of ∠ A in terms ...

Applications of Trigonometry Exercise 9.1 Solutions

1. A circus artist is climbing a 20 m long rope, which is tightly stretched and tied from the top of a vertical pole to the ground. Find the height of the pole,if the angle made by ...

Exercise 14.3 Solution Chapter Statistics

Q.1 The following frequency distribution gives the monthly consumption of electricity of 68 consumers of a locality. Find the median, mean and mode of the data and compare them. Q.2 ...

Exercise 14.2 Chapter Statistics Solution

Q.1 The following table shows the ages of the patients admitted in a hospital during a year: Find the mode and the mean of the data given above. Compare and interpret the two measures ...

Chapter Statistics Exercise 14.1 Solution

Q.1 A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of plants in 20 ...
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