1.

The graph of the function \[\cos x\ \cos (x+2)-{{\cos }^{2}}(x+1)\] is [IIT 1997 Re-Exam]

A.            A straight line passing through \[(0,\,\,-{{\sin }^{2}}1)\]with slope 2     
B.            A straight line passing through (0, 0)
C.            A parabola with vertex \[{{75}^{o}}\]
D.            A straight line passing through the point \[\left( \frac{\pi }{2},-{{\sin }^{2}}1 \right)\] and parallel to the x?axis               
Answer» E.


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