(cos x)y +(sin y)x=k
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If X is a real number then the cosine of x ranges from -1 to +1.
-1<=cos(x)<=+1
Similar thing applies for Sin(x)
-1<=sin(x)<=+1
Also whenever sin(x) is 0, cos(x) is 1 and vice versa.
Cos(x)+Cos(y)=2
=> 1+1=2
Sin(x)+Sin(y)=0.
-1<=cos(x)<=+1
Similar thing applies for Sin(x)
-1<=sin(x)<=+1
Also whenever sin(x) is 0, cos(x) is 1 and vice versa.
Cos(x)+Cos(y)=2
=> 1+1=2
Sin(x)+Sin(y)=0.
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