Is sinx cosx ever equal to 1?
From Pythagorean Identities sin^2x+cos^2x=1and from that identities we can have sinx+cosx=1, taking sinx=1−cosx and substitute in the equationsinx+cosx=1(1−cosx)+cosx=1Remove the parenthesis1−cosx+cosx=1cancel cosx1=1
