Question

Q=13.The X component of vector A is 10 unit and its angle vith X-axis 60 then
the magnitude of vector A will be?
(a)100 unit
(b) 20 unit
(c)40 unit
(d) 60°unit​

Answer 1

Given,

Acos∅ = 10units

∅ = 60°

Acos∅ = 10

A cos60° = 10

A×1/2 = 10

A = 20units

Magnitude of A =(b) 20units

Cheers!