Find the cosin value of 120 degree
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Answered by
1
Answer:
We can represent the angle 120 degree are 180- 60 degrees. therefore, the value of cos 120 degree is equal minus cos 60 degrees which is _1/2.
Answered by
1
Answer:
Step-by-step explanation:
120 degree = 180-60 degree
cos(120) = cos(180-60)
Since,120 degrees is in the second quadrant,so cos(180-x) = cos(x)
cos(120) = cos(180-60)
= -cos(60)
= -1/2
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