Question

19. Prove that
(1) sin^224°-sin^26°
(ii) sin^2 72º - Cos^2 30​

Answer 1

Answer:

Explanation:

From property of complement arcs -->

sin (65) = sin (90 - 25) = cos (25)

sin2(25)+sin2(65)=sin2(25)cos2(25)=1