Question

URGEEEENT! DAU COROANĂ
Sin 45 cos 45 - sin30 cos 60​

Answer 1

sin 45=1/√2

cos 45 = 1/√2

sin 30=1/2

cos 60=1/2

sin 45 cos 45-sin 30 cos 60

1/√2•1/√2-1/2•1/2=1/2(amplificam cu 2)-1/4=

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