SOLUTION: Evaluate sin 390 degrees + cos (-45 degrees)-sin(-225 degrees)

SOLUTION: Evaluate sin 390 degrees + cos (-45 degrees)-sin(-225 degrees)

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Question 180127: Evaluate sin 390 degrees + cos (-45 degrees)-sin(-225 degrees)
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
sin 390 or sin 30 degrees is 1/2
cos -45 or cos 45 degrees is
sin -225 or sin 45 degrees is
:
so 1/2+ -
:
=1/2
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