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Prove that: (a) cos510^(@) sin510^(@) + ...

Prove that: (a) `cos510^(@) sin510^(@) + sin(-330^(@)) cos(-390^(@))=0`
b) `tan(11pi)/(3) -2sin(9pi)/3-3/4"cosec"^(2)pi/4 + 4cos^(2)(17pi)/6=(3-2sqrt(3))/2`

Text Solution

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a) `187/205`, b) `133/205`, c) `-84/205`, d) `156/205`
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