Question

(c) Evaluate the value of 4 sin? 30° + 3 cos 60° +2 cot 30°​

Answer 1

Step-by-step explanation:

A scalar or scalar quantity in physics is one that can be described by a single element of a number field such as a real number, often accompanied by units of measurement. A scalar is usually said to be a physical quantity that only has magnitude, possibly a sign, and no other characteristics.

Answer 2

Question:-

• Evaluate the following.

Solution:-

$\sf 4 \: { \sin }^{2}30 \degree + 3 \cos60 \degree - 2 \cot30 \degree$

$\sf = 4 \times \frac{1}{4} + 3 \times \frac{1}{2} - 2 \sqrt{3}$

$\sf = 1 + \frac{3}{2} - 2 \sqrt{3}$

$\sf = \frac{2 + 3 - 4 \sqrt{2} }{2}$

$\sf = \frac{5 - 4 \sqrt{2} }{2}$

Hence, the required answer is (5-4√2)/2.

Refer to the T-Ratio table for T-Ratio of standard angles.