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Find the length of the tanget to a circl...

Find the length of the tanget to a circle with centre 'O' and radius `=6cm` from a point P such that `OP=10cm`.

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`R=(abc)/(4D)`
`D=1/2*6*6sintheta`
`D=18sintheta`
`a=6,b=6`
`sin(theta/2)=C/12`
`C=12sin(theta/2)`
`R=(6*6*12sin(theta/2))/(4*18sintheta)`
`R=(6sin(theta/2))/sintheta`
...
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