दर्शाइए कि (cos^(2)(45^(@)+theta)+cos^(2...

दर्शाइए कि `(cos^(2)(45^(@)+theta)+cos^(2)(45^(@)-theta))/(tan(60^(@)+theta) tan(30^(@)- theta))=1` है।

A

`-1`

B

`0`

C

`1`

D

`2`

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