Question

If z= ax+by and r is the
correlation coefficient between x and y
show that VAR(Z)=a2VAR(x)+b2VAR(y)+2abVAR(x)VAR(y)

Answer 1

Answer:

1 - tan²(PI/4 - Theeta)/1+tan²(PI/4 - Theeta) = Sin 2 theeta

Step-by-step explanation:

1 - tan²(PI/4 - Theeta)/1+tan²(PI/4 - Theeta) = Sin 2 theeta1 - tan²(PI/4 - Theeta)/1+tan²(PI/4 - Theeta) = Sin 2 theeta