what is sin30+cos180-tan60
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sin 30 = 1/2
cos 180 = -1
tan 60 = √3
sin30 + cos180 - tan60
= 1/2 + (-1) - √3
= (1 - 2 - 2√3)
2
= (-1 -2√3) / 2
= - (1+2√3) / 2
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