Question

Sin square 75 minus cos square 45

Answer 1

Answer

1\4

step1:sin^2(75)-cos^2(45

=sin^2(45+30)-cos^2(45)

=sin^2(45)+sin^2(30)-cos^2(45)

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

=1+1-1/4

=1/4