Question

Question #e6ede

Answer 1

`sin110+cos70*tan190`

`=sin(90+20)+cos(90-20)*tan(180+10)`

`=cos20+sin20*tan10`

`=2cos^2 10-1+2sin10cancelcos10*sin10/cancelcos10`

`=2cos^2 10-1+2sin^210`

`=2(cos^2 10+sin^2 10)-1`

`=2*1-1=1`