minta tolong yang bisa jawab no 31&32...Makasih :)

31. tan Π/3 × cos 5Π/6 - sin 3Π/4 × cos Π/4
= √3 × ( - √3 / 2 ) - √2/2 × √2/2
= - 3/2 - 2/4
= - 3/2 - 1/2
= -2 (A)