Jika theta di kuadran 1 dan tan theta = 5/12, nilai tan 4theta / 5 =....

jwab
theta = t

tan t = 5/12
tan 2t = (2 tan t) / ( 1 - tan² t)  =(10/12) /  (1-  (25/144))
= 12(10)/) ( 144 -25)
= 120 /119

tan 4t = 2 tan 2t / 1 - tan² 2t)
=  2 (120/119) / ( 1 - (120/119)²
= 2(120)(119) /(119²-120²)
= 28.560 / -239 = -119,5

(tan 4t)/ 5 = -23,9