A) -1
B) 0
C) 1
D) None of these
Correct Answer: B
Solution :
\[\cos A+\sin (270{}^\circ +A)-\sin (270{}^\circ -A)+\cos (180{}^\circ +A)\] =\[\cos A-\cos A+\cos A-\cos A=0\].You need to login to perform this action.
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