cos O = ?..
Asked by
| 26th Nov, 2012,
07:06: PM
Expert Answer:
WE KNOW THAT SIN 30=COS (90-30)= COS 60,
AND SIN 30 =1/2
SO OBVIOUSLY COS 60 =1/2
Answered by
| 27th Nov, 2012,
05:16: PM
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