What is the sum of sin 22 degrees 30 minutes multiplied by cos 67 degrees 30 minutes five The answer to this question is 2 - root 2 and divide by 4 I don't know how to do it. The teacher gives me directions

What is the sum of sin 22 degrees 30 minutes multiplied by cos 67 degrees 30 minutes five The answer to this question is 2 - root 2 and divide by 4 I don't know how to do it. The teacher gives me directions

=sin22.5*sin22.5=(1-cos45)/2=(1-√2/2)/2=(2-√2)/4

What are sin22 and sin14?
Please refer to the table

sin22=0.374606593
sin14=0.241921895

(sin22 degree + cos45 Degree * sin23 degree) / cos22 degree - sin45 Degree * sin23 degree, simplification

sin22°+cos45°sin23°=sin(45°-23°)+cos45°sin23°=sin45°cos23°-cos45°sin23°+cos45°sin23°=sin45°cos23°cos22°-sin45°sin23°=cos(45°-23°)-sin45°sin23°=cos45°cos23°+sin45°sin23°+sin45...