(Q9)If tan A=

3

4

,then find the other trigonometric ratio of angle A.

Hence tan A=Opposite side/Adjacent side=3/4

Therefore,

opposite side:adjacent side=:

For angle A,let,opposite side=BC=3k(where k is any positive number)

Adjacent side=AB=4k

Now,we have a triangle ABC (by Pythagoras theorem)

AC²=AB²+BC²

AC²=K²

AC=k=Hypotenuse

Now,we can easily write the other ratios of trigonometry