The value of cos^2 10^0-cos10^0cos50^0+c...

The value of `cos^2 10^0-cos10^0cos50^0+cos^2 50^0` is equal to `4/3` (b) `1/3` (c) `3/4` (d) `3`

A

`3/2(1+cos20^(@))`

B

`3/4`

C

`3/4+cos20^(@)`

D

`63/16`

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