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sqrt(2)* " cosec " 20^(@) sec 20^(@)=...

`sqrt(2)* " cosec " 20^(@) sec 20^(@)=`

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Prove that sqrt(3) " cosec "20^(@)-sec 20^(@)=4

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Prove that: sqrt(3)"cosec"20^(@)-sec20^(@)=4

Prove that: sqrt(3)"cosec"20^(@)-sec20^(@)=4

Prove that: sqrt(3)"cosec"20^(@)-sec20^(@)=4