Explanation

The set of all natural numbers, together with zer,o is the set of whole numbers

Explanation

 The phrase 'A Blessing in Disguise' refers to something that at first appears to be bad or unlucky but is actually good

Explanation

 "The cat is hiding under the table."

"under" correctly describes the position of the cat beneath the table.

(a) in – means inside something (e.g., in the box)

(b) on – means on top of something (e.g., on the table)

(d) between – used when referring to something in the middle of two objects

Explanation

 A complex number a + bi is considered purely imaginary if its real part, 'a', is equal to zero.

In other words, a pure imaginary number has the form bi, where 'b' is a real number. 

Explanation

She was very anxious about her exam results.

"Anxious" fits best because it expresses nervousness or worry

Explanation

The synonym of "Old بوڑها  " from the provided list is Aged  بوڑها کر دینا

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Explanation

1−sin2θ=cos2θ

Explanation

Natural numbers are also commonly called counting numbers.

They are the positive integers {1, 2, 3, ...}.

Sometimes, depending on the definition, they may also be referred to as positive integers or non-negative integers when including zero

Explanation

"but" is used to contrast intention with inability.

I would go, but I don’t have time.

Explanation

 The synonym of "Being وجود میں آنا.." from the provided options is close بند کرنا

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