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The value of (2sin40^(@).sin50^(@).tan10...

The value of `(2sin40^(@).sin50^(@).tan10^(@))/(cos 80^(@))` is

A

`1//2`

B

1

C

2

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
`((2sin 0^(@).sin 40^(@))sin 10^(@))/(sin 10^(@).cos 10^(@))`
`=((cos 10^(@)-cos 90^(@))sin 10^(@))/(sin 10^(@).cos 10^(@))`
= 1
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