高中物理 问题研究无线电调幅图象研究教学论文 新人教版34Word文档下载推荐.docx

1、-0.91-0.18738-0.90.309017-0.890.728969-0.880.968583-0.87-0.86-0.85-0.84-0.83-0.82-0.81-0.8-0.79-0.78-0.77-0.76-0.75-0.74-0.73-0.72-0.71-0.7-0.69-0.68-0.67-0.66-0.65-0.64-0.63-0.62-0.61-0.6-0.59-0.58-0.57-0.56-0.55-0.54-0.53-0.52-0.51-0.5-0.49-0.48-0.47-0.46-0.45-0.44-0.43-0.42-0.41-0.4-0.39-0.38-0.3

2、7-0.36-0.35-0.34-0.33-0.32-0.31-0.3-0.29-0.28-0.27-0.26-0.25-0.24-0.23-0.22-0.21-0.2-0.19-0.18-0.17-0.16-0.15-0.14-0.13-0.12-0.11-0.1-0.09-0.08-0.07-0.06-0.05-0.04-0.03-0.02-0.010.010.020.030.040.050.060.070.080.090.10.110.120.130.140.150.160.170.180.190.20.210.220.230.240.250.260.270.280.290.30.310

3、.320.330.340.350.360.370.380.390.40.410.420.430.440.450.460.470.480.490.50.510.520.530.540.550.560.570.580.590.60.610.620.630.640.650.660.670.680.690.70.710.720.730.740.750.760.770.780.790.80.810.820.830.840.850.860.870.880.890.90.910.920.930.940.950.960.970.980.991.011.021.031.041.051.061.071.081.0

4、91.11.111.121.131.141.151.161.171.181.191.21.211.221.231.241.251.261.271.281.291.31.311.321.331.341.351.361.371.381.391.41.411.421.431.441.451.461.471.481.491.5表1 x与cos16x数据表图1 y=cos16x图象2 低频声音信号的范围内设定自变量x,，间隔同样设为0.01，求出对应的y=sin2x的值，然后画出图象。表2和图2分别为数据表和图象。x cos2x0.9980270.9921150.9822870.9510570.9297

5、760.9048270.8443280.8090170.7705130.6845470.6374240.5877850.4817540.4257790.3681250.248690.1873810.125333-1.8E-16-0.06279-0.12533-0.24869-0.30902-0.36812-0.48175-0.53583-0.58779-0.68455-0.72897-0.77051-0.84433-0.87631-0.90483-0.95106-0.96858-0.98229-0.998036.28E-156.13E-173.06E-16图2 y=cos2x的图象3 调幅在同

6、一幅图中画出y1=cos2x, y2=-cos2x, y3=cos2xcos16x的图象，数据表和图象分别如表3和图3所示。cos2x-cos2xcos2xcos16x0.8745770.5316020.061678-0.4124-0.76942-0.92244-0.84129-0.55858-0.158210.561680.7060670.6630410.4646620.181636-0.1004-0.30708-0.39588-0.36522-0.105890.0117660.0671570.0550241.84E-16-0.05502-0.06716-0.011770.1058870.3652220.395880.307081-