Question

if x=3sina ,y=3cosa eliminate a

Answer 1

Answer:

x² + y² = 9    

Step-by-step explanation:

x = 3Sina; y = 3Cosa

x² = 9Sin²a.

y² = 9Cos²a

add both the equations

x² + y² = 9Sin²a + 9Cos²a = 9(Sin²a+Cos²a)

// Sin²a+Cos²a = 1

x² + y² = 9