數學
高中

請問一下這一題要怎麼算?

~ 史詩 了22+ese32 之個

Choosen As Best Answer

(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

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