RD SHARMA Solutions for Class 10 Maths Chapter 10 - Trigonometric Ratios
Chapter 10 - Trigonometric Ratios Exercise Ex. 10.1
In ABC right angled at B, AB = 24 cm, BC = 7 cm. Determine
(i) sin A, cos A
(ii) sin C, cos C
In ABC by applying Pythagoras theorem
AC2 = AB2 + BC2
= (24)2 + (7)2
= 576 + 49
= 625
AC = = 25 cm
Given 15 cot A = 8. Find sin A and sec A
Chapter 10 - Trigonometric Ratios Exercise Ex. 10.2
If A = B = 60o, verify that cos (A - B) = cos A cos B + sin A sin B
If sin (A - B) = sin A cos B - cos A sin B and cos(A - B) = cos A cos B + sin A sin B, find the values of sin 15o and cos 15o.
Prove that
Chapter 10 - Trigonometric Ratios Exercise Ex. 10.3
Express each one of the following in terms of trigonometric ratios of angles lying between 0o and 45o
(i) sin 59o + cos 56o
(ii) tan 65o + cot 49o
(iii) sec 76o + cosec 52o
(iv) cos 78o + sec 78o
(v) cosec 54o + sin 72o
(vi) cot 85o + cos 75o
(vii) sin 67o + cos 75o
If sin 3A = cos (A - 26o), where 3A is an acute angle, find the value of A.
Chapter 10 - Trigonometric Ratios Exercise 10.56
So, the correct option is (a).
Chapter 10 - Trigonometric Ratios Exercise 10.57
So, the correct option is (d).
So, the correct option is (c).
If A and B are complementary angles, then
(a) sin A = sin B
(b) cos A and cos B
(c) tan A = tan B
(d) sec A = cosec B
So, the correct option is (b).
So, the correct option is (a).
So, the correct option is (b).
So, the correct option is (d).
Chapter 10 - Trigonometric Ratios Exercise 10.58
So, the correct option is (b).
So, the correct option is (d).
Sin 2A = 2 sin A is true when A =
(a) 0o
(b) 30o
(c) 45o
(d) 60o
So, the correct option is (a).
Chapter 10 - Trigonometric Ratios Exercise 10.59
So, the correct option is (c).
Other Chapters for CBSE Class 10 Mathematics
Chapter 1- Real Numbers Chapter 2- Polynomials Chapter 3- Pairs of Linear Equations in Two Variables Chapter 4- Quadratic Equations Chapter 5- Arithmetic Progressions Chapter 6- Co-ordinate Geometry Chapter 7- Triangles Chapter 8- Circles Chapter 9- Constructions Chapter 11- Trigonometric Identities Chapter 12- Heights and Distances Chapter 13- Areas Related to Circles Chapter 14- Surface Areas and Volumes Chapter 15- Statistics Chapter 16- ProbabilityRD SHARMA Solutions for CBSE Class 10 Subjects
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