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Selina Concise Mathematics Class 9 ICSE Solutions Trigonometrical Ratios Selina ICSE Solutions for Class 9 Maths Chapter 22 Trigonometrical Ratios [Sine, Consine, Tangent of an Angle and their Reciprocals] Exercise 22(A) 1. From the following figure, find the values of : (i) sin A (ii) cos A (iii) cot A (iv) sec C (v) cosec C (vi) tan C. Solution 1: 2. Form the following figure, find the values of : (i) cos B (ii) tan C (iii) sin 2 B + cos 2 B (iv) sin B. cos C + cos B. sin C Solution 2: 3. From the following figure, find the values of : (i) cos A   (ii) cosec A (iii) tan 2 A - sec 2 A   (iv) sin C (v) sec C   (vi) cot 2   C -  Solution 3: 4. From the following figure, find the values of : (i) sin B   (ii) tan C (iii) sec 2  B - tan 2 B   (iv) sin 2 C + cos 2 C Solution 4: 5. Given: sin A =   , find : (i) tan A(ii) cos A ...