The evaluation of the function requested as a fraction in lowest terms is :
<h2>Sin ∠A = 4/5</h2>
<h3>Further explanation</h3>
Firstly , let us learn about trigonometry in mathematics.
Suppose the ΔABC is a right triangle and ∠A is 90°.
<h3>sin ∠A = opposite / hypotenuse</h3><h3>cos ∠A = adjacent / hypotenuse</h3><h3>tan ∠A = opposite / adjacent </h3>
There are several trigonometric identities that need to be recalled, i.e.




Let us now tackle the problem!
Look at ΔABC in the attachment.
We will use the following formula to find the sine value as a fraction in lowest terms.
sin ∠A = opposite / hypotenuse



<h3>Learn more</h3>
<h3>Answer details</h3>
Grade: College
Subject: Mathematics
Chapter: Trigonometry
Keywords: Sine , Cosine , Tangent , Opposite , Adjacent , Hypotenuse , Triangle , Fraction , Lowest , Function , Angle