cos 70^(@) * cos 10^(@) + sin 70^(@) * s...

`cos 70^(@) * cos 10^(@) + sin 70^(@) * sin 10^(@)` बराबर है

A

`sin (70^(@) + 10^(@) )`

B

`cos (70^(@) + 10^(@))`

C

`(1)/(2)`

D

`(sqrt(3))/(2)`

लिखित उत्तर

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