Answer:
x = 3
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
9
it's 3 I think
C
The difference formula for cosine is
cos(x - y) = cosxcosy + sinxsiny
Consider
cos75 = cos(120 - 45)°, then
cos(120 - 45)°
= cos120°cos45° + sin120°sin45° → C
105
15*6=90
6*5=30
30/2=15
90+15=105
