SOLUTION: Sec A + tan A =2 find sin A + cos A ?

Question 1109042: Sec A + tan A =2 find sin A + cos A ?

Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!

Let us say .
Then,

Substituting those expressions for sine and cosine,

Squaring both sides,

and ,
which translate into and .
is not a solution of the original equation,
because it would make and undefined.
For , , and
.
would make and so that is not a solution either.
makes and is the solution.
So .

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