Questions
Vector makes an angle with Z-axis which is equal to
a
cos-125
b
cos-122
c
cos-1225
d
None of these
detailed solution
Correct option is C
P=6i^+42j^+42k^Let P makes angle γ with Z - axis.∴ γ=cos-1PzPHere, Pz = 42and P=(6)2+(42)2+(42)2=10∴ γ=cos-14210=cos-1225Talk to our academic expert!
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A vector rotated about its tail through an angle 450 in clockwise direction. Then the new vector is
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