log tan1° +log tan2° +……..+log tan 89° is …….

1.	log tan1° +log tan2° +……..+log tan 89° is …….
A.	1
B.	\(\frac{1}{{\sqrt 2 }}\)
C.	0
D.	-1
Answer» D. -1

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log tan1° +log tan2° +……..+log tan 89° is …….

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