Q55
The elimination of θ from xcosθ - ysinθ = 2 and xsinθ + ycosθ = 4 will give:
A.
3x2 - y2 = 20
B.
x2 + y2 = 20
AnswerC.
3x2 + y2 = 20
D.
x2 - y2 = 20
Answer: Option B
Solution
Answer: Option B
Solution:
xcosθ - ysinθ = 2 . . . . . . (i)xsinθ + ycosθ = 4 . . . . . . (ii)
Squaring equation (i) and equation (ii) and adding-
x2 + y2 = 20