English, asked by lekhana26022004, 4 months ago

if cosx=-1/2 & x lies in 3rd quadrant find sin x/2.cos x/2

Answers

Answered by aqeelahmed6281310

1

Answer:

Explanation:

π<x<23π⇒2π<2x<43π and sin is positive in 2nd quadrant. ∴sin2x=5 2 . Using 1+cosx=2cos22x⇒cos2x=±21+cosx .

∴tan

2

x

=−

2

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