Question

If x = a cos 0, y = b sin 0, then b²x²+ + a²y² - a²b² is equal to :​

Answer 1

Step-by-step explanation:

sin0 = 0

then y=0

but cos0 =1

then

x=a

b2a2-a2b2

0

Answer 2

Answer:

Step-by-step explanation:

b^2(acosO)^2+a^2(bsinO)^2

=b^2a^2cos^2O+a^2b^2sin^2O

=(ba)^2[cos^2O+sin^2O)

=(ba)^2×1

=(ab)^2