2cosx+sininx=1 then 7cosx+6sinx=
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Answer:-
>2cox+sinx=1
>sinx=1-2cosx. -----------eq(1)
Put value of eq(1) in:-
>7cosx+sinx
>7cosx+6(1-2cosx)
>7cosx+6-12cosx
>-5cosx+6
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