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luisr0754
22.07.2021 •
Mathematics
If cos(θ) = -4/5, how do I find all the exact values of the other 2 primary trig ratios (sin and tan) and all possible approximate values of θ (to the nearest degree), when 0° ≤ θ ≤ 360°?
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Ответ:
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Ответ:
Using the Law of Sines
FD / sine (E) = ED / sine (63)
3.8 / 0.95106 = ED / 0.89101
side DE = 3.8 * .89101 / .95106
side DE = 3.5600677139
Source:
http://www.1728.org/trigtut2.htm