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C is a point outside circle with centre A. and radius "r".

CB and CD  are tangents segments whose length is "t".

find area of triangle BCD in terms of "r" and "t"

6 years ago


Answers : (1)


Dear ajinka


CA = √r2+t2

sinθ =r/√r2+t2

cosθ = t/√r2+t2

AP =rsinθ  = r2/√r2+t2

BP =rcosθ = tr/√r2+t2


                        =2[rt/2   - 1/2 AB * BP]

                        =rt - {r2/√r2+t2}{ tr/√r2+t2}

                        =rt - r3t/(r2+t2)


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6 years ago

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