Question

if costhe + sintheta = √2 costheta, then
prove that cos theta - sintheta = √2 sintheta​

Answer 1

Answer:

(b) Given the regression equation Y on X 8X-10Y+66 = 0 and the regression

equation X on Y 40X-18Y = 214. Find the correlation coefficient “r”.

Answer 2

Answer:

your answer attached in the photo