# Thread: Trig identities

1. ## Trig identities

Hello

can someone please verify this answer for me?

(1+cotA) / (cscA)

(1+cosA/sinA) / 1 * (sinA/1)/1

answer is CosA

2. Originally Posted by l flipboi l
Hello

can someone please verify this answer for me?

(1+cotA) / (cscA)

(1+cosA/sinA) / 1 * (sinA/1)/1

answer is CosA
I don't follow what you did with the denominator? If you recall the way of dividing fractions we treat it as multiplying

$\left(1+\frac{cosA}{sinA}\right) \times sinA$

$\left(\frac{sinA+cosA}{sinA}\right) \times sinA = sinA + cosA$

edit: the answer cannot be $cosA$ because the identity doesn't hold for $A = \frac{\pi}{2}$