Mohon bantu yang nomor 10 yaa ehe

PQ² = PR² - RQ²
PQ² = 25² - 15²
PQ² = 625 - 225
PQ² = 400
PQ = √400
PQ = 20

==================
PS² = PR² - SR²
PS² = 25² - 7²
PS² = 625 - 49
PS² = 576
PS = √576
PS = 24

======================
sin (x + y)° = sin x . cos y + cos x . sin y
                  = SR/PR . PQ/PR + PS/SR . RQ/PR
                  = 7/25 . 20/25 + 24/25 . 15/25
                  = 140/625 + 360/625
                  = 500/625
                  = 4/5

jawaban E