Question

Find the angle between two lines
2x - y + 3 = 0 and x + 2 y + 3 = 0) is
(a) 90°
(b) 60°
​

Answer 1

Answer:

a. 90

Step-by-step explanation:

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Answer 2

Answer:

tan theta= |(m1-m2)|/|(1+m1m2)|

m1= -A/B

m1= 2

m2= -1/2

tan theta= [2-(-1/2)]/1+2*-1/2

tan theta= 5/2

theta= 60

Step-by-step explanation: