Answer:
When you see a formula like this, try to operate, so you will see some identities sooner or later. In this case, we have a substraction identity:
\frac{cos ( \alpha - \beta )}{cos \alpha cos \beta } = \frac{cos \alpha cos \beta + sin \alpha sin \beta }{cos \alpha cos \beta } = 1 + tan α · tan β
Step-by-step explanation:
Y+3=2(x-5)
y+3=2x-10
y+3+10=2x
y+13=2x
2x-y=13
Answer:
x is in the top left of the triangle :)
Step-by-step explanation: