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Find cos^-1(3/10 cos (tan^-1(4/3)+2/5sin...

Find `cos^-1(3/10 cos (tan^-1(4/3)+2/5sin(tan^-1(4/3)))`

A

0

B

`pi/3`

C

`pi/6`

D

`pi/2` or `pi/4`

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