Question

if mode a+b = mode a-b then teta value​

Answer 1

• Given :

=> mode a+b = mode a-b

• Calculation :

=> Suppose, R1 = a + b and R2 = a - b

=> R1^2 = R2^2

=> a^2 + b^2 + 2ab cos@ = a^2 + b^2 - 2ab cos@

=> 2ab cos@ = -2ab cos@

=> 2 cos@ = 1

=> cos@ = 1/2

=> @ = cos^-1 1/2

=> @ = 60 degree

• Answer

So, angle between a and b is 60 degree...

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