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cos(x-(pie/2))=cos(x)tan(x)
I have to verify this identity and cant seem to figure it out. cos (x-y)=cos x * cos y + sin x * sin y
well since cos y = 0, it kind of eliminates that side of the equation and I end up with sinx * sin1
Did I go about this all wrong?
I have to verify this identity and cant seem to figure it out. cos (x-y)=cos x * cos y + sin x * sin y
well since cos y = 0, it kind of eliminates that side of the equation and I end up with sinx * sin1
Did I go about this all wrong?