Nilai dari sin 3π/4.cos 2π/3 – cos 3π/4.cos 2π/3​

Penjelasan dengan langkah-langkah:

= sin 3π/4 . cos 2π/3 – cos 3π/4 . cos 2π/3

= sin(3π/4 – 2π/3)

= sin(135° – 120°)

= sin(15°)

= (√6 – √2)/4