sec2x=4xy(x+y)2 is true if and only if(a) x + y ≠ 0(b) x = y, x ≠ 0(c) x = y(d) x ≠0, y ≠ 0

sec2x=4xy(x+y)2 is true if and only if(a) x + y ≠ 0(b) x = y, x ≠

1.	sec2x=4xy(x+y)2 is true if and only if(a) x + y ≠ 0(b) x = y, x ≠ 0(c) x = y(d) x ≠0, y ≠ 0
Answer» $\sec^{2} x = \frac{4 x y}{(x + y)^{2}}$ is true if and only if (a) x + y ≠ 0 (b) x = y, x ≠ 0 (c) x = y (d) x ≠0, y ≠ 0