1.

Statement-1 : sin78^(@)+sin52^(@)+sin50^(@)=4cos25^(@)cos26^(@)cos39^(@) Statement-2 : If A+B+C=pi, then. cosA+cosB+cosC=4cos.(A)/(2)cos.(B)/(2)cos.(C)/(2).

Answer»

Statement-1 is TRUE, statement-2 is true, statement-2 is a CORRECT EXPLANATION for statement-2
Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-2
Statement-1 is true, statement-2 is FALSE
Statement-1 is false, statement-2 is true

Answer :A


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