a) Cross multiply, expand, move everything to one side, factorise and solve.
b) Multiply both sides by to get . Solve.
Note that: . . . . (Think about it!)
So we have: .
Take the tangent of both sides:
Quadratic Formula: .
yes i remember it,, its the same step just like the tan 60 degrres before right???? how did u know and figure out how to solve it?? whats your trick?
here,, i solved letter b but its wrong
i ended up with 1/2 is not equal to 1/3
heres my solution or scratchhttp://img186.imageshack.us/img186/1323/qqqqqqqqqqy.png
which is equal to
Solve the quadratic, I would use the difference of two squares to solve
Edit: Oops, I posted the answer to B not A which is in the quote
From what I can tell you're right (although confusing lol) up to . However, when you took the square root you didn't take the negative.
Taking the reciprocal of both sides:
I got answers of and (or ) as solutions (although only principal solutions because no range is defined in the question)
so discard that solution (from factoring out )
Case 1: Does ever equal ?
where did n pi / 2 came from?
what is the porper way t o solve sec^2x = sqaure root of 2