Question

eliminate theta from the following X=4costheta-5sintheta,y=4sintheta+5costheta .​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

X² + Y² = 41

Step-by-step explanation:

X²= 16 cos²theta -40 costheta sintheta + 25 sin²theta

Y²= 25 cos²theta -40 costheta sintheta + 16 sin²theta

Adding both:

X²+Y²=(16 cos²theta+16 sin²theta)+(25 sin²theta+25 cos²theta)-40 costheta    sintheta+40 costheta sintheta

         =16+25+0=41