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Question : 72 of 160
Marks:
+1,
-0
Solution:
The equation is expressed as,
|a−b|2=|a|2+|b|2−2a.b Substitute the values in the above equation.
(3)2=42+52−2a.b a.b=16 Since,
cosθ= = = Consider the figure,
tanθ= tan2θ=
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