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If sin 3A=cos(A+10), where 3A is an acut...

If sin 3A=cos(A+10), where 3A is an acute angle, then what is the value of `2cosec frac (3A)(2)+6sin^2 3A-3/2 tan^2 3A`?
यदि sin 3A=cos(A+10), जहां 3A एक न्यून कोण है,तो `2cosec frac (3A)(2)+6sin^2 3A-3/2 tan^2 3A` का मान क्या है?

A

`7/4`

B

4

C

`17/2`

D

5

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