Explanation

An antecedent is the word, phrase, or clause to which a pronoun refers.

For example, in "John lost his keys," "John" is the antecedent of the pronoun "his."

Explanation

Given the expression (A and x∈B) represents the condition where x belongs to both A and B:

This directly implies the intersection of sets A and B.

Explanation

A vacuum flask is designed to minimize heat transfer by radiation, conduction, and convection to keep the contents hot or cold.

It uses a vacuum between two walls to prevent heat loss through conduction or convection, and its reflective surface helps reduce heat transfer by radiation.

Explanation

قرآن مجید میں سورۃ الفتح کی آیت 1 میں "فتح مبین" کا ذکر صلح حدیبیہ کے لیے کیا گیا ہے۔

اگرچہ یہ صلح بظاہر مسلمانوں کے حق میں نہ لگتی تھی، لیکن اس نے اسلام کی اشاعت کے لیے دروازے کھول دیے۔

Explanation

زکوٰۃ اسلام کا ایک اہم ارکان ہے جو دو ہجری کو فرض ہوا تھا۔

زکوٰۃ غریبوں اور ضرورت مندوں کی مدد کر کے معاشرے میں انصاف اور برابری کو فروغ دیتی ہے۔

یہ دولت کی گردش کو یقینی بنا کر غربت کے خاتمے اور معاشرتی بہتری کا ذریعہ بنتی ہے۔

Explanation

Given the area of the square is 289:

Area = side²

289 = side²

side = √289 = 17

Explanation

Quadrantal angles are angles like 0°, 90°, 180°, 270°, etc.

Their terminal sides lie along the x-axis or y-axis, i.e., coordinate axes.

Explanation

"Strangely quiet" is the correct form because "strangely" is an adverb modifying the adjective "quiet," describing how quiet the room was.

Adverbs modify adjectives (or verbs) and usually end in "-ly," like "strangely," while "quiet" is an adjective here.

Explanation

Given cosec(90 - θ):

Using trigonometric identities, cosec(90 - θ) = sec(θ).

Explanation

In indirect speech, the tense of the reported speech is usually changed. The present tense "is" becomes the past tense "was."

Direct speech: "She said, 'It is cold.'"

Indirect speech: "She said it was cold."