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cos30°=√3/2 だから θ-π/4=π/6
θ=π/6-π/4=-π/12
0≦θ＜2π にするために 2πを足す
−π/12+2π=23π/12
Mathematics
Senior High
Resolved
この問題の（2）の問題を教えていただきたいです
0≦02 のとき, 次の方程式を解け。
(1) (一
sin(0-4)--1/12
6
(2) cos
cos (0+1)=√33
2
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