Question

the angle between the lines x+y+1=0 and 2x+2y=-1 is
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Answer 1

Step-by-step explanation:

$\huge\bf{\mid{\overline{\underline{ANSWER:-}}\mid}}$

Imp point :-

Slope of given line =>

- x coefficient / y coefficient

Ex :-

ax +by +c = 0

it's slope is

m = -a/b

$A = x + y = -1 \\ \\ slope \: of \: A = -1 \\ \\ B = 2x + 2y = -1 \\ \\ slope \: of \: B = -1$

$Using \: \: formula.... \\ \\ \tan( \theta) = | \frac{m_2 - m_1}{1 + m_1m_2} | \\ \\ \tan( \theta) = | \frac{ - 1 + 1}{1 + ( - 1)( - 1)} | \\ \\ \tan( \theta) = {0}^{ \circ}$

$\large{ \therefore Angle \: between \: lines \: is \: {0}^{\circ}}$

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