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Math P1 doubt

S

sakibfaiyaz

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Find XO and XC
then use, required angle= cos^-1 {( XO.XC)/ (|XO|x|XC|)}........(i)

Solution :
XO = -2i -j -2k
XC = i -2j -k

XO.XC= 2
|XO| x |XC| = 3 x 6^1/2

using the formula given in (i),
Angle = 74.2

Hope it helps :)
 
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