In triangle ABC, if measure angle A=85° and sin B = cos B, then measure angle C=... A) 30°
B) 45°
C) 50°
D) 60°

please help with an explaination!!

C. 50°

Step-by-step explanation:

ΔABC = 180°

A° + B° + C° = 180°

85° + 45° + C° = 180° *B = 45°,remember that cos α has same value with sin α in 45° = √2/2 . You can check it. So,

C° = 180° - 130°

C° = 50°

CMIIW

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

i am not sure :

step-by-step explanation: