Question

高一数学函数计算（要具体过程） 着急啊

Answer 1

4sinα-2cosα/5cosα+3sinα

=(4tanα-2)/(5+3tanα)=10/14=5/7

sinαcosα

=sinαcosα/((sinα)^2+(cosα)^2)=tanα/((tanα)^2+1)=3/10

(sinα+conα)^2

=1+2sinαcosα

=8/5