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Question : 113 of 160
Marks:
+1,
-0
Solution:
Now,
2−‌=2(−++2)−(−2++3)‌=+and
+=−++2+2−−=+Let
θ be the angle between
2− and
+.
‌∴‌‌cos‌θ=‌| (+)⋅(+) |
| √12+12√12+12 |
‌⇒‌‌cos‌θ=‌=‌⇒‌‌θ=‌
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