Question

Simplifique:
y=sec x · cotg x

Answer 1

$sec x = \frac{1}{cosx}$

$cotx = \frac{cosx}{senx}$

y = $\frac{1}{cosx} . \frac{cosx}{senx} = \frac{1}{senx}$

e

$\frac{1}{senx} = cosscx$

logo

y = cosscx

Answer 2

$y = secx\cdot cotgx$
$y = \frac{1}{cosx}\cdot \frac{cosx}{senx}$
$y = \frac{1}{senx}$
y = cossecx