Question

Trigonometri
tolong dong .. 20 point
Nomor 5 ajah pake cara !!

Answer 1

Di kuadran 2 => 90<a<180, sin bernilai +, tan dan cos bernilai -

sin a = y/r
sin a = 5/13

x^2 + y^2 = r^2
x^2 + 25 = 169
x^2 = 144
x = 12

cos a = - x/r
cos a = -12/13

tan a = -y/x
= -5/12

tan a : sec a
= tan a : 1/cos a
= tan a x cos a/1
= tan a x cos a
= sin a/cos a x cos a
= sin a
= 5/13 (B)

Answer 2

Maaf kalo salah ya kak,,,