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CBSE Class 12-science Answered

complex no.
Asked by Kirandoon | 13 May, 2009, 03:48: PM
Expert Answer

1/ (1-cosθ )+isinθ 

Rationalise the denomiantor

((1-cosθ) - isinθ) / (1-cosθ) - isinθ) (1-cosθ) + isinθ)

= ((1-cosθ) - isinθ)/ (1-cosθ)2 - (isinθ)2

= ((1-cosθ) - isinθ)/ 1+cos2θ - 2cosθ + sin2θ 

= ((1-cosθ) - isinθ)/ 2(1-cosθ)

 

Answered by | 14 May, 2009, 11:19: AM
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