Question

1. Evaluate sin 600°cos 30° + sin 30° cos 600​°
is value -1
hint - sin630 = sin(2×360-90)
= - sin90 = -1 becouse I asked
this question two times before
but no one solved correct.
please help me
​

Answer 1

I hv tried to solve it but the answer which you told did not came

Answer 2

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