Question

Comprehension type question :

(x₁, y₁) be a fixed point on a straight line which makes an angle θ with the positive direction of x-axis, then the equation of the straight line in parametric form can be written as : x = x₁ + rcosθ & y = y₁ + rcosθ

Now, the parametric equation of a straight line is given by : x = -2+r/√10, y = 1+3r/√10

Q1. The Cartesian equation of the line?

(A) x + y + 2 = 0
(B) x + y + r = 0
(C) 3x - y + 7 = 0
(D) NOT

Q2. Area of the triangle formed by the straight line and coordinate axes?

(A) 3 sq. units
(B) 2√7 sq. units
(C) 4/3 sq. units
(D) 8⅙ sq. units

Q3. The normal form of given straight line?

(A) x/3 - y/2 = 1
(B) -3/√10x + 1/√10y = 7/√10
(C) xcosɑ + ysinɑ = p
(D) y = mx+c​

Answer 1

Answer:

A

C

B

Step-by-step explanation:

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