Obicz wartosci funkcji powstałych funkcji:
a) tg L=5
Będę pisała zamiast L x, oki?
tgx = 5
ctgx = 1/tgx = 1/5
sinx / cosx = 5 /1
sinx = 5cosx
sin^2x + cos^2x = 1
(5cosx)^2 + cos^2x = 1
25cos^2x + cos^2x = 1
26cos^2x = 1
cos^2x = 1/26
cosx = √26 / 26
sinx = 5 * √26 / 26 = 5√26/26
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Będę pisała zamiast L x, oki?
tgx = 5
ctgx = 1/tgx = 1/5
sinx / cosx = 5 /1
sinx = 5cosx
sin^2x + cos^2x = 1
(5cosx)^2 + cos^2x = 1
25cos^2x + cos^2x = 1
26cos^2x = 1
cos^2x = 1/26
cosx = √26 / 26
sinx = 5 * √26 / 26 = 5√26/26