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If costheta=3//7,and theta lies in the f...

If `costheta=3//7,and theta` lies in the fourth quadrant, evaluate : `sin(theta//2),cos(theta//2),tan(theta//2).`

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The correct Answer is:
`sin(theta/2)=sqrt(2/7), cos(theta/2)=-sqrt(5/7), tan(theta/2)=-sqrt(2/5)`
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MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES AND FACTORIZATION FORMULAE-MCQs
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