Question

prove that sin²theta + cos²theta = 1​

Answer 1

Answer:

sin^2theta+cos^2theta=1

Step-by-step explanation:

in a triangle- a^2+b^2=c^2

= AB^2+BC^2=AC^2

= AB^2/AC^2+BC^2/AC^2=AC^2/AC^2

= AB^2/AC^2+BC^2+AC^2=1     --1

Perpendicular(P)/Hypo(H)=sin theta

Base(B)/Hypo(H)=cos theta

from --1

sin ^2 theta + cos^2 theta = 1