Question

Stary

請問一下這一題要怎麼算？

~          史詩
了22+ese32 之個

Answer 1

✨ 最佳解答 ✨

imma_idiot

(sin/cos)^2 + (cos/sin)^2 = (sin^4 + cos^4)/sin^2 cos^2 = 26/5;
(sin^4 + cos^4 + 2sin^2 cos^2)/sin^2 cos^2 = (sin^2 + cos^2)^2/sin^2 cos^2 = 1/sin^2 cos^2 = 26/5 + 2 = 36/5(D