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

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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.*