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The value of sin ^(3) 10^(@) + sin ^(3) ...

The value of `sin ^(3) 10^(@) + sin ^(3) 50^(@) - sin ^(3) 70^(@)` is equal to

A

`-3/2`

B

`3/4`

C

`-3/4`

D

`-3/8`

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Verified by Experts

The correct Answer is:
D
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