2 questions

Note

sin 23 = cos(90 - 23) = cos (67°)....so x = 67

The second one seems trickier than it really is

RP....note that

sin P = cosR and

cos P = sin R

so

Sin R - cos R =

Cos P - Sin P = .8192 - . 5736 = 0.2456

Edit to correct a previous mistake !!!

Thank you for all of your help, I really appreciate it!