If cosine of odd integral multiple of \( \frac{\pi}{2} \) is \( a \), tangent of integral multip...

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If cosine of odd integral multiple of \( \frac{\pi}{2} \) is \( a \), tangent of integral multiple of \( \pi \) is \( b \), sine of integral multiple of \( \pi \) is \( c \), cosine of odd integral multiple of \( \pi \) is \( d \) and even integral multiple of \( e \) and let \( \sin \left(2 n \pi+\frac{\pi}{2}\right)=f, \sin \left(2 n \pi-\frac{\pi}{2}\right)=g,(n \in I) \) and then \( a+b+c+d+e+f+g= \)
(a) 1
(b) -1
(c) 0
(d) 2
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