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Find the value of the following : (a) s...

Find the value of the following :
(a) `sin 210^(@)` (b) `cos 220^(@)` (c ) `tan 245^(@)`

Text Solution

Verified by Experts

`sin120^(@)=sin(90^(@)+30^(@))=cos 30^(@)=(sqrt3)/(2)`
Aliter `sin 120^(@)=sin(180^(@)-60^(@))=sin 60^(@)=(sqrt3)/(2)`
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