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Coordinate Geometry — MATHEMATICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9MATHEMATICSCoordinate Geometry2 Marks
Question
Find the inclination of the line whose slope is $1$
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Answer

Slope $= \tan\theta $
$\therefore 1 = \tan\theta ...($given$)$
But $ \tan 45^\circ = 1$
$\therefore \tan\theta = \tan45^\circ $
$\therefore \theta = 45^\circ .$

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