Question

Prove sin2 theta+cos2 theta=1

Answer 1

Answer:consider a right angle triangle ABC

Take B as 90degree

Now AB/AC=sin tetha

And BC/AC=cos tetha

Therefore, from given

(AB)^2/(AC)^2+(BC)^2/(AC)^2

We in a right angle triangle

AB+BC=AC

Hence proved

Step-by-step explanation: