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If \(\vec{a}\) and \(\vec{b}\) are two non-zero vectors, then \(\vec{a}\cdot \vec{b}=-|\vec{a}||\vec{b}|\), if -

Q1

If \(\vec{a}\) and \(\vec{b}\) are two non-zero vectors, then \(\vec{a}\cdot \vec{b}=-|\vec{a}||\vec{b}|\), if -

a

\(\theta =\frac{\pi }{2}\)

b

\(\theta =0^\circ\)

c

\(\theta =\pi\)

d

\(\theta =\frac{3\pi }{2}\)

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