(sin(-660^(@))tan(1050^(@))sec(-420))/(cos(225^(@))cos ccc(25^(@))cos(510^(@)))=

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

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

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

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

cos 225^(@)+ sin 165^(@)=

cos510^(@)cos330^(@)+sin390^(@)cos120^(@)

sin(-870^(@))+cos ec(-660^(@))+tan(-855^(@))+2cot(840^(@))+cos(480^(@))+sec(900^(@)) is equal to

sin225^(@)=sin(180^(@)+45^(@))=-sin45^(@)=-(1)/(sqrt(2)) cos246^(@)=cos(180^(@)+66^(@))=-cos66^(@)=-0.4067 tan211^(@)=tan(180^(@)+31^(@))=tan31^(@)=0.6009 .

cos225^(@)+sin195^(@)=

(a)Find the exact value of (sin 300^@tan 330^@ sec (-420^@) )/(cot 135^@ cos 210^@ cosec 315^@ )