Question

At what angle must the two forces (x + y) and (x – y) act so
that the resultant may be (x² + y²) ?
(a) cos⁻¹[-(x² + y² ) / 2(x² - y² )]
(b) cos⁻¹[-2(x² - y² ) /(x² + y² )]
(c) cos⁻¹[-(x² + y² ) /(x² - y²)]
(d) cos⁻¹[-(x² - y² ) /(x² + y² )]

Answer 1

Answer:

(a)

Explanation:

hope the answer is helpful