Trigonometric Ratios CBSE NCERT Solutions Chapter 8 Exercise 8.1 Question 3
3. If, sin A = , find cos A and tan A.
sin A = opposite side to angle A / Hypotenuse =
Let BC = 3k and AC = 4k because it is given that sin A =
Using Pythagoras theorem on , we can say that
cos A = Adjacent side to angle A / Hypotenuse = AB / AC =
tan A = (Opposite side to angle A) / (Adjacent side to angle A) = BC /AB