高考总复习优化设计二轮用书数学考点突破练1　三角函数的图象与性质.pptx

考点突破练1三角函数的图象与性质高考总复习优化设计GAOKAOZONGFUXIYOUHUASHEJI2024

123456789101112131415161718必备知识夯实练B解析∵sin2α=1-cos2α,∴1-cos2α=cosα-1,即cos2α+cosα-2=0,∴(cosα-1)(cosα+2)=0,解得cosα=1或cosα=-2(舍去).

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1234567891011121314151617184.(多选题)(2023河北邢台模拟)函数f(x)=Asin(ωx+φ)+k(A0,ω0,0φπ)在一个周期内的图象如图所示,则()BD

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123456789101112131415161718C由图可知,两函数图象有3个交点.故选C.

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123456789101112131415161718解析如图所示,区域①和区域③面积相等,故阴影部分的面积即为矩形ABCD的面积.由题可得AB=3,

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123456789101112131415161718(答案不唯一)

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123456789101112131415161718关键能力提升练B

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123456789101112131415161718BCD

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123456789101112131415161718BC

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123456789101112131415161718核心素养创新练AB

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12345678910111213141516171818.(2023河北保定一模)有一街边旧房拆除后,打算改建成矩形花圃ABCD,中间划分出直角三角形MPQ区域种玫瑰,直角顶点M在边AB上,且距离A点5m,距离B点6m,且P,Q两点分别在边BC和AD上.已知BC=8m,则玫瑰园的最小面积为()A

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