EasyPhysicsplane angle
+4 / -1
The dot product of two vectors A and B inclined at angle θ is:
A
AB cosθ
B
AB sinθ
C
AB tanθ
D
AB/cosθ
Explanation
Dot (scalar) product gives a scalar quantity. It is maximum when θ=0° (parallel vectors) and zero when θ=90° (perpendicular vectors). Used to find work done: W = F · d = Fd cosθ.
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The value of sin²θ + cos²θ is:
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