Cevap:
#rarrcsc (teta / 2) = sqrt26 #
Açıklama:
İşte, #270^(@)##<## Teta ##<##360^@#
# Rarr135 ^ (@) ##<## Teta / 2 ##<##180^@# Anlamı # Teta / 2 # ikinci kadranda #sin ve csc # olumlu.
# Rarrcottheta = -12 / 5 #
# Rarrtantheta = -5/12 #
# Rarrcostheta = 1 / sectheta = 1 / sqrt (1 + tan ^ 2teta) = 1 / sqrt (+ (1 - 5/12) ^ 2) 12/13 # =
#rarrcsc (teta / 2) = 1 / sin (teta / 2) = 1 / sqrt ((1-costheta) / 2) = 1 / sqrt ((1-12 / 13) / 2) = 1 / sqrt (1 / (26),) = sqrt26 #
