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यदि `theta` न्यून कोण हो और `(theta+18^(@))=1//2,` हो, तो चक्रीय माप से `theta` का मान कितना होगा ?
A. `pi//12` Radians
B. `pi//15` Radians
C. `2pi//5` Radians
D. `3pi//13` Radians

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Best answer
Correct Answer - b
`sin(theta+1 8)=(1)/(2)`
`sin(theta+18)=sin 30`
`theta+18=30`
`therefore theta=12`
we know that
`180^(@)=pi`
`12^(@)=(pi)/(180)xx12=(pi)/(15)`

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