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Choose the correct answer in each of the following questions:
`sin47^(@)cos43^(@)+cos47^(@)sin43^(@)=?`

A

`sin4^(@)`

B

`cos4^(@)`

C

`1`

D

`0`

Text Solution

Verified by Experts

The correct Answer is:
C
Given expression `=sin47^(@)cos(90^(@)-47^(@))+cos47^(@)sin(90^(@)-47^(@))`
`=(sin^(2)47^(@)+cos^(2)47^(@))=1.`
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