Explanation

Given 0 ≤ A ≤ 90°, we're looking at the first quadrant of the unit circle where sine values range from 0 to 1.

The minimum value of sin A in this range occurs when A = 0°:

sin(0°) = 0

Explanation

Pi (π) is defined as the ratio of the circumference of a circle to its diameter.

Mathematically, π = Circumference ÷ Diameter.

Explanation

Modal verbs express ability, possibility, permission, or obligation.

Can, could, may, shall, should, must are classic modal verbs.

Explanation

A power set contains all possible subsets of a given set, including the empty set and the set itself.

Example: If set = {a, b}, then power set = {∅, {a}, {b}, {a, b}}.

Explanation

In indirect speech, "have to" becomes "had to" and "we" changes to "they" when referring to others.

The sentence is in the past reporting tense, so verb and pronoun shifts are necessary.

Explanation

تھڑا اٹھنا کا مطلب ہے سخت کانپنا یا شدید خوف یا سردی کی وجہ سے جسم میں کپکپی آنا۔

یہ اظہار عام طور پر جسمانی یا ذہنی حالت میں شدید ردعمل کو ظاہر کرنے کے لئے استعمال ہوتا ہے۔

Explanation

The poem 'A Green Cornfield' is written by Christina Rossetti.

Christina Rossetti was an English writer.

Christina Rossetti belonged to United Kingdom.

Explanation

If b² - 4ac < 0, the discriminant is negative, meaning the quadratic equation has complex (imaginary) roots.

These roots are conjugate pairs and unequal.

Explanation

The measure of each exterior angle of a pentagon = 360°/n = 360°/5 = 72°.

Explanation

Projective tests are often used to evaluate personality because they involve open-ended questions or stimuli that allow individuals to project their feelings, thoughts, and desires.

These tests provide insights into the unconscious aspects of personality, which can be more difficult to assess through structured tests like inventories or surveys.