一些高一的正弦余弦函数性质题,来帮忙1.判断正误①2cosx=3 ( )②sin^2x=1/2 ( )③sin^2x=4 ( )2.利用三角函数的单调性比较下列各组数的大小.①sin225°与sin135°②sin(-54/7·π)与sin(-63/8·π)③cos25
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/21 06:56:19
![一些高一的正弦余弦函数性质题,来帮忙1.判断正误①2cosx=3 ( )②sin^2x=1/2 ( )③sin^2x=4 ( )2.利用三角函数的单调性比较下列各组数的大小.①sin225°与sin135°②sin(-54/7·π)与sin(-63/8·π)③cos25](/uploads/image/z/2573964-36-4.jpg?t=%E4%B8%80%E4%BA%9B%E9%AB%98%E4%B8%80%E7%9A%84%E6%AD%A3%E5%BC%A6%E4%BD%99%E5%BC%A6%E5%87%BD%E6%95%B0%E6%80%A7%E8%B4%A8%E9%A2%98%2C%E6%9D%A5%E5%B8%AE%E5%BF%991.%E5%88%A4%E6%96%AD%E6%AD%A3%E8%AF%AF%E2%91%A02cosx%3D3++++++%28+%29%E2%91%A1sin%5E2x%3D1%2F2+++%28+%29%E2%91%A2sin%5E2x%3D4+++++%28+%292.%E5%88%A9%E7%94%A8%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%E7%9A%84%E5%8D%95%E8%B0%83%E6%80%A7%E6%AF%94%E8%BE%83%E4%B8%8B%E5%88%97%E5%90%84%E7%BB%84%E6%95%B0%E7%9A%84%E5%A4%A7%E5%B0%8F.%E2%91%A0sin225%C2%B0%E4%B8%8Esin135%C2%B0%E2%91%A1sin%28-54%2F7%C2%B7%CF%80%29%E4%B8%8Esin%28-63%2F8%C2%B7%CF%80%29%E2%91%A2cos25)
xVKOV+;L*A]ϖEVjf&h I2GiGP8Ϊ$>nfX{;Nͧa78دjX*촉qtJtg*KP'NZ]*Sh7OPS萋_R8',w%sdu_Bo.evQQQmGY#=o/L7}ƒT @ؿ*Nr@E!Dpy
.PBK9cŐȎヸ
*yR3 ],"٫2.qz,0_eÛ]8g1.!7^a, I)kܙ<=ӡ,y@@Պ;#`<Iө~WRU"V%0ԇ3ݽƃC#i,3'tlY]SǸШ`^bJ@"SXcJ{d̗,c/ȣ[T&+.KO|^R"KL)R*JrY^AR0%`!eFZ~g?v@.">Ry)_XuTur\v(H?
@c}#d1wG̍F77R(a=H
$ޑThϲL" ]}יe'}n2