三角函數(shù)及解三角形測(cè)試題

1、三角函數(shù)及解三角形測(cè)試題三角函數(shù)及解三角形測(cè)試題一、選擇題1.已知sincos2??????(0π)則sin2?=（）A?1B22?C22D12.若sincos1sincos2???????則tan2α=（）A34B34C43D433.已知?為第二象限角3sin5??則sin2??（）A2425?B1225?C1225D24254.函數(shù)f(x)=sinxcos(x6?)的值域?yàn)椋ǎ〢[22]B[33]C[11]D[3232]5.函數(shù)2s

2、in(09)63xyx????????????的最大值與最小值之和為（）A23?B0C1D13??6.已知?00????直線x=4?和x=54?是函數(shù)()sin()fxx????圖像的兩條相鄰的對(duì)稱軸則?=（）ABCDπ4π3π23π47.函數(shù)()sin()4fxx???的圖像的一條對(duì)稱軸是（）A4x??B2x??C4x???D2x???8.要得到函數(shù)cos(21)yx??的圖象只要將函數(shù)cos2yx?的圖象（）A向左平移1個(gè)單位B向右

3、平移1個(gè)單位C向左平移12個(gè)單位D向右平移12個(gè)單位9.在ABC?中若60A???45B???32BC?則AC?（）A43B23C3D32(1)求函數(shù)()fx的解析式(2)設(shè)(0)2???則()22f??求?的值.20.已知向量(sin1)(3coscos2)(0)3AmxnAxxA??????函數(shù)()fxmn?????的最大值為6.(Ⅰ)求A(Ⅱ)將函數(shù)()yfx?的圖象向左平移12?個(gè)單位再將所得圖象上各點(diǎn)的橫坐標(biāo)縮短為原來的12倍