Concept: The direction cosines of the vector is the corresponding coordinate of the vector divided by the length\/Magnitude of the vector. Calculation: Here,
→
a
=(−2
∧
i
+
∧
j
−5
∧
k
)
→
∣
a∣=√(−2)2+12+(−5)2=√30 The direction cosines of the given vector =