15 it stays the same just like with positive and negative
Answer:
the answer is d
Step-by-step explanation:
I just took the test
cos 90°
(cos 60°)(cos 30°) − (sin 60°)(sin 30°)
= cos ( 60° + 30°)
= cos 90°
3/4 = 12/y
3/4 * y = 12
.25 * y = 12
y = 3
Hope this helps! :)
look at the picture i sent........
