sin^2 0 + ? = 1 sin 0/ cos 0 = ? Is any body able to explain this to me?

sin^2 0 + ? = 1

sin 0/ cos 0 = ?

Solution:

By trigonometry, sine^2(x)+cos^2(x)=1 for all x.

Putting x=0.sine^2 0+cos^2 0 = 1.

sine^2 0 +cos^2 0  = 1, as sin 0 = 0 and cos 0 =1

So, cos^2 0 =1 is to be added to sine^2 0 to get 1

To find Sin 0 /cos 0 .

Sin 0 =  0 and cos0 =1.

So,sin 0/cos 0 = 0/1 = 0.