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9. The angle whose sine is 0.39581 is
OA. 4 deg. 10 min.
OB. 23 deg. 19 min.
C. 35 deg. 02 min.
OD. 66 deg. 42 min.


Sagot :

Answer:

B. 23 deg. 19 min.

Step-by-step explanation:

sin(x) = 0.39581

use the calculator (sin‐¹) and you get

x = 23.31650126...°

so, the correct answer must be B, as none of the others have 23° as part of the solution.

FYI

to get the minutes :

as 1° has 60' (one degree has 60 minutes), the first 2 decimal places after the decimal point (31) represent 31/100 of 60 minutes :

31×60/100 = 31×6/10 = 186/10 = 18.6 minutes ≈ 19 minutes.