(in)
(แสดงวิธี) (วาด
5
(2) tsing - 13
vrei
sec A = ?
(3) COSCA = 2
cos
arres tang ?
จงพา
(4) AABC Dapas a athiaparzon ÅT AB=2√3 não AC=4
37
27
Agen cosed C
2
(5) 37 tana = 2
43327 cosec A-9
จง
677 A+B=90° 11/22 17 COSA = 8 oren cot
ถ้า
cot B
C
e
note)
