Find the value of cos 210° + sin5π/3
Answers
Answered by
4
Answer:
cos 120°=cos(180+30) °
Explanation:
cos120°=cos 30°
sin5π/3=sin 300°
sin 300=sin(360-60)
sin300=-sin 60°
cos30-sin60=0
Answered by
8
Answer:
answer is -√3 . I think.
Explanation:
cos (2π- 210)=cos150=-√3/2
sin 5π/3=sin300=sin(2π-300)=-sin60=-√3/2
sin60 + cos120 = -√3/2 - √3/2 =-√3
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