(cos^(3)20^@- cos^(3) 70^@)/(sin^3 70^@ ...

`(cos^(3)20^@- cos^(3) 70^@)/(sin^3 70^@ - sin^3 20^@)` का मान है :

A

`1/2`

B

`1/sqrt2`

C

1

D

2

लिखित उत्तर

Verified by Experts

The correct Answer is:

C

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