1) oct.
2) sept.
4) aug. &' sept
Not 100% though .
Step-by-step explanation:
Recall that

Therefore,

so


Hey there :)
- tan²x + sec²x = 1 or 1 + tan²x = sec²x
sin²x + cos²x = 1
Divide the whole by cos²x


so

and

so

Therefore,
tan²x + 1 = sec²x
Take tan²x to the other side {You will have the same answer}
1 = - tan²x = sec²x or sec²x - tanx = 1
The equation of a vertical line passing through the point (-5,-1) is x = -5