I guess it is simplifying the expression:

Answer:

Step-by-step explanation:
We are given that

We have to find the value of
To find the value of
we will use table of sin
From sin table
We get

=0.587785
We have to round off the answer to four decimal places
Therefore,

Answer:
x=126 degrees
Step-by-step explanation:
x+21=147 because they are opposite adjacent angles
x=126 degrees
Answer:
431 and 43
Step-by-step explanation:
Two numbers: y1 and y
Number one: y1 = 10 * y + 1
(10 * y + 1) + y = 474
11y = 473
y = 43
Two numbers: 431 and 43
check: 431 remove 1 (digit) -> 43
431+43=474
Answer:
A
Step-by-step explanation:



This option works