sin 45 = (√2) / 2

sin 60 = 1 / 2

cos 60 = 1

cos 45 = 1 / √2

cos 30 = √3 / 2

tan 30 = √3

tan 60 = √3

tan 45 = 1 / 2

sin 30 = cos 30

sin 45 = cos 45

sin 60 = cos 30

sin x + sin x = sin 2x

sin x + sin x = 2sin x

cos x - cos x = cos 0

cos x × cos x = cos (x²)

cos x × cos x = (cos x)²

sin x ÷ n = six

sin x + sin y = sin (x + y)

sin 30 + cos 60 = tan 90