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For `theta` being an acute angle, `4(2 sin^2 theta+7 cos^2 theta) = 13`. What is the value of `theta` ?
यदि `theta` एक न्यून कोण है तथा `4(2 sin^2 theta+7 cos^2 theta) = 13` है, तो `theta` का मान क्या होगा ?

A

`60^@`

B

`45^@`

C

`30^@`

D

`0^@`

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