-23 / sin^2 45+cos^2 225

Question

-23 / sin^2 45+cos^2 225

Answer 1

-23/ (sin² 45м ⁰ + cos² 225⁰ ) =-23/ (sin² 45м ⁰ + cos² (270⁰ - 45⁰ ) ) = -23/ (sin² 45м ⁰ +
sin² 45 ⁰ ) = -23 /(2 sin² 45 ⁰) = - 23  /  2(√2/2)²= -23 /1 = -23