Question

(sin2 45° − cos2 30°)

Answer 1

Answer:

-1/4

Step-by-step explanation:

sin 45=1/√2

so sin^2 45°=1/2

cos 30=√3/2

cos^2 30°=3/4

1/2-3/4

-1/4

Answer 2

Answer:

The answer is -1/4

Step-by-step explanation:

sin 45= 1/$\sqrt{2}$

cos 30=$\sqrt{3}$/2

>>(sin2 45° − cos2 30°)

=(1/$\sqrt{2}$)^2 - ($\sqrt{3}$/2)^2

=1/2- 3/4

=-1/4

Hope I was able to help!!