If cos θ = , where m>n>0,and cosec θ <0 , express sin θ and tan θ in terms of m and n.
i don't really know how to even start it.
is in a right triangle with: .
Using Pythagorus, we find that: .
And we can now express and
To apply the correct signs to our answer, we note that:
. . is positive: is in Quadrant 1 or 4.
. . is negative: is in Quadrant 3 or 4.
. . . . Hence, is in Quadrant 4.
Go for it!