3 years ago

Find the equation of a line that is perpendicular to the line X=-6 and contains the point (4,-5)

Mathematics

1 answer:

Vladimir [108]3 years ago

3 0

Y=-5 i hope this helps :)

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△ABC is inscribed in a circle. Find the angle between the tangents to the circle at points B and C, if m∠CAB=50°.

Daniel [21]

$DB,DC \: are \: tangents \: to \: (O) \: at \: B,C\\\Rightarrow DB\perp OB \: at \: B, DC\perp OC \: at \: C\Rightarrow \widehat{DBO}=\widehat{DCO}=90° \\ \widehat{BOC}=2\widehat{BAC}=2\times 50°=100°\\\widehat{BDC}=360°-\widehat{BOC}-\widehat{DBO}-\widehat{DCO}=360°-100°-90°-90°=80°$