Question

If tan(A)=1. Find Sin(A).Cos(A)=?​

Answer 1

If tan A = 1

By trigonometry table

A=45

Sin 45=1/√2

cos 45=1/√2

Sin 45×cos 45=1/2

Answer 2

TanA=1

Tan45=1

So,

TanA=tan45

A=45

Now

SinA=sin45=1/root2

CosA=cos45=1/root2

Now,

SinA. CosA

=1/root2. 1/root2

=1/2