Mathematics, trigonometry, Uncategorized

Introduction to Trigonometry – Exercise 8.4 – Class 10

1. Express the trigonometric ratios sin A, sec A and tan A in terms of cot A.  Solution: We know that, 2. Write all the other trigonometric ratios of ∠A in terms of sec A.  Solution: We know that 3. Evaluate (i) (sin263° + sin227°)/(cos217°+cos273°) (ii) sin25° cos65° + cos25° sin65°  Solution: (i) (ii)sin25° cos65° + cos25° sin65°  =… Continue reading Introduction to Trigonometry – Exercise 8.4 – Class 10