what is the value of cos 120
ravi78:
1/2
Answers
Answered by
12
cos 120°
= cos (180°-60°)
= -cos 60°
= -1(1/2)
= -1/2
I hope this helps you ^_^
= cos (180°-60°)
= -cos 60°
= -1(1/2)
= -1/2
I hope this helps you ^_^
Mb
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Answered by
3
Answer:
cos 120°=1/2
Explanation:
cos 120
cos (90+30)
due to the angle π/2 cos change to sin.
hence sin 30
sin 30 =1/2
hence sin 30 = cos 120 =1/2
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