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dimonbigbibon
@dimonbigbibon
August 2022
1
6
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найти синус и тангенс угла A если косинус 3/7
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5vladis5p728w1
Sin^2 (a) = 1 - cos^2 (a)
sin (a) = корень(1 - cos^2 (a)) = корень(1 - (3/7)^2) = корень(1 - 9/49) = корень(40/49) = корень(40) / 7
tan (a) = sin(a) / cos(a) = (корень(40) / 7) / (3/7) = корень(40) / 3
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Answers & Comments
sin (a) = корень(1 - cos^2 (a)) = корень(1 - (3/7)^2) = корень(1 - 9/49) = корень(40/49) = корень(40) / 7
tan (a) = sin(a) / cos(a) = (корень(40) / 7) / (3/7) = корень(40) / 3