Why may i not multiply with 0 both sides in trigonometric identity to

1.	Why may i not multiply with 0 both sides in trigonometric identity to equal rhs and lhs
Answer» No, we can\'t multiply with 0. We can\'t equate a problem by multiplying 0 on both side because, when We multiply a number on both side, The division of both the number should be equal to 1. For example;. 3x+y=k. If we multiply 0 by both side. 0(3x+y)=0k. Here the division of 0 by 0 is undefined in maths .0/0 is indeterminate means it can\'t be defined

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