Explanation

Factors of 18 and 24:

Factors of 18 = 1, 2, 3, 6, 9, 18

Factors of 24 = 1, 2, 3, 4, 6, 8, 12, 24

Therefore, the HCF of 18 and 24 is 6.

Explanation

tan 45° = 1 in trigonometry.

Explanation

The cosine of π radians (or 180 degrees) is -1.

Explanation

 We need to calculate:

Step 1: Find the Values

From trigonometric values:

• sin90∘=1
• cos90∘=0

Step 2: Multiply

Final Answer:

0

Explanation

The value of log 1, regardless of the base (as long as it's a valid base for logarithms,i.e., positive and not equal to 1), is always 0.

This is because any number raised to the power of 0 equals 1.

For example, log₁₀(1) = 0 and ln(1) = 0. 

Explanation

That makes it 4 x 20 to get the total sum which is 80

80=5+10+15+x

80–30=x

50=x

Explanation

Organic chemistry is the branch of chemistry that focuses on the structure, properties, composition, reactions, and preparation of compounds containing carbon.

While many organic compounds also contain hydrogen, oxygen, nitrogen, and other elements,

The defining element in organic chemistry is carbon.

Explanation

   Perimeter احاطہ / ارد گرد

Perimeter formula =a+b+c

=6.5+7+10.5=24

Explanation

The atomic mass of sodium (Na) is approximately 23 atomic mass units (amu).

It is based on the sum of protons and neutrons in its most common isotope.

Explanation

The atomic number of chlorine is 17

Chlorine is a yellow-green gas at room temperature.

Symbol: Cl

Atomic mass: 35.453 u

Atomic number: 17

Boiling point: -34.04 °C

Melting point: -101.5 °C

Electrons per shell: 2, 8, 7

Electron configuration: [Ne] 3s²3p⁵