Answer:
The answer to your question is 
Step-by-step explanation:
Data
cos Ф = 3/5
tan2Ф = ?
Quadrant IV
Process
1.- Remember that tanФ =
and cos Ф = 
then, adjacent side = 3 and hypotenuse = 5
2.- Calculate opposite side
O² = h² - a²
O² = 5² - 3²
O² = 25 - 9
O² = 16
O = 4
3.- Calculate the tan 2Ф
tan 2Ф = 2(
) The opposite side is negative in the fourth
quadrangle
tan 2Ф = 
Answer:
11/2
Step-by-step explanation:

when,

Now substitute the value we get,

Answer:
The Answer is: 6 inches by 5 inches.
Step-by-step explanation:
Given: A structure that is 30 ft by 25 ft.
Scale: 3 in to 15 ft.
Or - Scale: 1 in to 5 ft.
Divide the sides by 5 to get how many 1" sections:
30 ft / 5 = 6 inches
25 ft / 5 = 5 inches
The sides of the drawing are 6 inches by 5 inches. This represents the 30 ft by 25 ft rectangle.
Hope this helps! Have an Awesome Day!! :-)