Question

answer this please urgent

Answer 1

Answer:

Step-by-step explanation:

Answer 2

x=( a sin theta - b cos theta )× cos theta

x=a sin theta cos theta - b cos^2 theta -(1)

y=(acos theta +b sin theta)×sin theta

y=a sin theta cos theta + b sin^2 theta -(2)

By (1) - (2)

x-y = a sin theta cos theta - b cos ^2 theta - a sin theta cos theta - b sin^2 theta

x-y = -b( cos^2 theta + sin^2 theta)

x-y = -b

thus theta is removed.