Question

sin square 30 + cos square 60 - tan square 45= 1/2​

Answer 1

sin^2 30 +cos^2 60 - tan^2 45 = -1/2

(1/2)^2 + (1/2)^2 - 1^2 = -1/2

1/4+1/4-1=-1/2

1+1-4/4 = -1/2

-2/4 = -1/2

-1/2 = -1/2