The value of sin1.cos2.tan3.cot4.sec5.cosec6 is
sin1=sin(firstquadrant+)=+vecos2=cos(secondquadrant+)=−vetan3=tan(secondquadrant+)=−vecot4=cot(thirdquadrant+)=+vesec5=sec(fourthquadrant+)=+vecosec6=cosec(forthquadrant+)=−vehencetheirproduct=−ve