在横线上填上“+”“-”“×”“÷”
9____ 3 = 36 ____ 9
4____6=20 ____4
42____6 = 21____3
16____ 2=8____1
45____5 = 12 ____3
49____7 = 14 ____7
若α为锐角,已知cosα=12,那么tanα=____