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ABCD is a cyclic quadrilateral then …

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ABCD is a cyclic quadrilateral then prove that CosA+cosB+CosC+cosD=0

Posted by Aditya Singh 4 years, 10 months ago

CBSE > Class 11 > Mathematics

2 answers

Aditya Singh 4 years, 10 months ago

As abcd is a cyclic quad A+C=180° B+D=180° A=180°-C B=180°-D Cos(180-C)+cos(180-D)+cosC+cosD -cosc-CosD+cosC+cosD =0 Hence proved

1Thank You

Aditya Singh 4 years, 10 months ago

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CBSE > Class 11 > Mathematics