यदि theta एक न्यूनकोण है और sin thetaco...

यदि `theta` एक न्यूनकोण है और `sin thetacos theta = 2cos^(3) theta – 1.5cos theta` तो `sin theta` किसके बराबर

A

`(sqrt(5)-1)/(4)`

B

`(1-sqrt(5))/(4)`

C

`(sqrt(5)+1)/(4)`

D

`-(sqrt(5)+1)/(4)`

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