sec times tan times sin equals?

Is that:

\sec\theta \times \tan\theta \times \sin\theta = ?

?

Convert the sec and tan ratios into sin and cos ratios first.

if it is secθ x tanθ x sinθ , then its pretty simple
secθ = 1/tanθ
1/tanθ x tanθ x sinθ
the 1/tanθ will cancel with the tanθ
so
secθ x tanθ x sinθ = sinθ since the first two terms cancel each other out

if it is secθ x tanθ x sinθ , then its pretty simple
secθ = 1/tanθ
1/tanθ x tanθ x sinθ
the 1/tanθ will cancel with the tanθ
so
secθ x tanθ x sinθ = sinθ since the first two terms cancel each other out

That is not correct.

\sec\theta \neq \frac{1}{\tan\theta}