Prove that sin²∅+cos²∅=1 ?

Step-by-step explanation:

Let ABC be a right angled triangle where there's a right angle in B . Let the measure of the angle BAC be ∅. So,

Also,

Now adding the values of sin^2∅& cos^2∅,

But we know that

by applying Pythagorean Theorem

So ,

853.3

step-by-step explanation: