sin(4π21). Explanation: Notice that this fits the form of the sine subtraction formula: sin(A−B)=sin(A)cos(B)−cos(A)sin(B).
Step-by-step explanation:
-33 + -20 is -53. and I don't how
Answer:Area of wall =

ft
Explanation:First, we know that:1 in = 1/12 ft
Therefore, the dimensions of the wall would be as follows:H = 7 ft 10 in =

ft
B1 = 10 ft 2 in =

ft
B2 = 14 ft 1 in =

ft
For the trapezium, area can be calculated using the following the following formula:Area of trapezium = Average base * height =

* height
Substitute with the given to get the area as follows:Area of wall = ([

+

] / 2) *

Area of wall =

ft
Hope this helps :)