Δabc is a right triangle in which is a right angle, ab = 1, ac = 2, and bc = . cos c × sin a =

In triangle ABC , A is right angle

Here it is given that AB=1 , AC=2 ,So by using pythagoras theorem we will get BC=√(1)²+(2)²=√5

So cosC=

And sinA=sin 90°=1

So the cosC × sinA=2/√5 (Answer)

step-by-step explanation:

bob the banana