What is the cosine of an angle of 60 degrees in an arbitrary triangle?

To find out the value, you need to look in the table of values.

Table values sin, cos, ctg.

sin 30 = 1/2 cos 30 = √3 / 2 tan 30 = √3 / 3 ctg 30 = √3 sin 450 = √2 / 2 cos 45 = √2 / 2 tan 45 = 1 ctg 45 = 1 sin 60 = √3 / 2 cos 60 = 1/2 tg 60 = √3 ctg 60 = √3 / 3
Answer: cos 60 ° = 1/2.




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