NCERT Miscellaneous Exercise Q9 - Trigonometric Functions

Question: If cos x=-1/3 and x lies in quadrant III, find sin(x/2), cos(x/2) and tan(x/2).

Answer: sin(x/2)=sqrt(2/3), cos(x/2)=-1/sqrt(3), tan(x/2)=-sqrt(2).

Full step-by-step NCERT solution with diagrams on Something by Zero.

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