If a=i+2j+2k,|b|=5 and the angle between vector a and b is π6, then the area of the triangle formed by these two vectors as two sides is?
154
152
15
1532
153
Explanation for the correct option:
Find the area of triangle:
Given, a=i+2j+2k,|b|=5
Now,
a=1+22+22=9=3
∴Area =12|a×b|
=12absinθ=123×5×sinπ6=1215×12=154
Hence, Option ‘A’ is Correct.