The value of sin A is equal to 
<h3>RIGHT TRIANGLE</h3>
A triangle is classified as a right triangle when it presents one of your angles equal to 90º. In this triangle from the trigonometric ratios or the Pythagoras Theorem (
), it is possible finding angles or sides.
<h3>Trigonometric Ratios</h3>
The main trigonometric ratios for a right triangle are presented below.



The question asks the sin A. First, you should find the hypotenuse from Pythagoras Theorem.

Now you can find sin A.

Learn more about trigonometric ratios here:
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B=1/4
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Answer:
eqn : 9 x 9 x h = 1620
h = 1620 / 81 = 20
Step-by-step explanation:
You need a little more information. Take a picture of the oroblem
The volume of a rectangular prism is represented by the following equation:

Where the variables are for volume, width, height, and length, respectively.
We are given that the area of one end is 16 cm² (units have to be correct when solving these problems, so it's 16 cm², not 16 cm as described in the problem). We know that 
Using this knowledge, we can change the volume equation to our needs.



Note: We know that A is 16 since it's given

The volume is 208 cm³ (once again, incorrect units given). Insert this into the equation.

Divide both sides of the equation by 16.

The length is 13 cm.
Let me know if you need any clarifications, thanks!