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MaryPoppins2
@MaryPoppins2
July 2022
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Найдите cos a и tg a, если sin a=1/3
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Tupenkaya228
1)sin^{2} a+cos^{2} a=1(основное тригонометрическое тождество)
(1\3)^{2} +cos
^{2} a=1
cos
^{2} a=1-1\9
cos
^{2} a=8\9
cos a=√8\3
2)tg a=sin a\cos a
tg a=1*3\3*√8
tg a=1\√8
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Answers & Comments
(1\3)^{2} +cos^{2} a=1
cos^{2} a=1-1\9
cos^{2} a=8\9
cos a=√8\3
2)tg a=sin a\cos a
tg a=1*3\3*√8
tg a=1\√8