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( sin (-660^(@)) tan (1050^(@)) sec (-42...

`( sin (-660^(@)) tan (1050^(@)) sec (-420^(@)))/(cos(225^(@)) "cosec"(315^(@)) cos (510^(@)))=`

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The value of (sin(-660^(@))tan(1050^(@))sec(420^(@)))/(cos(225^(@))cos ec(315^(@))cos(510^(@)))is :

sin300 ^ (@) cos ec1050 ^ (@) - tan (-120 ^ (@))

Find the value of sin(135^(@))cosec(225^(@))tan(150^(@))cot(315^(@))

Prove that: sin(-420^(@))(cos390^(@))+cos(-660^(@))(sin330^(@))=-1

Prove that sin(-420^(@))(cos390^(@))+cos(-660^(@))(sin330^(@))=-1

The value of (sin300^(@).tan330^(@).sec420^(@))/(tan135^(@).sin210^(@).sec315^(@)) is