Find the value of x:
i) `xcot(90^(@)+theta)+tan(90^(@)+theta)sintheta+"cosec"(90^(@)+theta)=0`
ii) `"cosec"(90^(@)+theta)+x costhetacot(90^(@)+theta)=sin(90^(@)+theta)`

Explanation

To solve the given equations step by step, we will break down each part and apply trigonometric identities where necessary.

### Part (i)

**Given Equation:**
\[ x \cot(90^\circ + \theta) + \tan(90^\circ + \theta) \sin \theta + \csc(90^\circ + \theta) = 0 \]

**Step 1: Simplify the trigonometric functions.**
...