In a class, teacher gave a statement: sinA + cos B =x, cosA - sinB =y. Then Ajit came forward saying that x2+y2=2. What can be said about Ajit's statement?
True in some cases
sinA + cos B= x ------- (i)
cosA - sinB= y ------ (ii)
Squaring (i) and (ii) and adding we get
x2+y2=2. So, Ajit's statement will always be true.