Question

sin600° cos330°+cos120°sin150°=​

Answer 1

Answer:

Step-by-step explanation:

sin 600 . cos 330 + cos 120 . sin 150

sin (1 × 360 + 240) . cos (360 - 30) + cos (180 - 60) . sin (180 - 30)

sin 240 . cos 30 + (-cos 60) . sin 30

sin (180 + 60) . 1/2√3 - 1/2 . 1/2

-sin 60 . 1/2√3 - 1/4

-1/2√3 . 1/2√3 - 1/4

-3/4 - 1/4

-4/4 = -1

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