rachel2735
01.06.2020 •
Mathematics
You are flying a kite with 20 feet of string extended. The angle of elevation from the spook of string to the kite is 67 degrees. How far off the ground is the kite if you hold the spool 5 feet off the ground?
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Ответ:
See below.
Step-by-step explanation:
sin pi/6 = 1/2
cos pi/3 = 1/2
tan pi/4 = 1
So sin^2 pi/6 + cos^2 pi/3 - tan^2 pi/4
= 1/4 + 1/4 - 1
= -1/2.