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Zharkov12345
@Zharkov12345
July 2022
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cos2 a + tg2 a cos2 a
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darina428
Tg=sin/cos, значит
cos^2a+sin^2a/cos^2a *cos^2a
косинусы сократятся и останется
cos^2a+sin^2a
по основному тригонометрическому тождеству:
cos^2+sin^2=1
5 votes
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Answers & Comments
cos^2a+sin^2a/cos^2a *cos^2a
косинусы сократятся и останется
cos^2a+sin^2a
по основному тригонометрическому тождеству:
cos^2+sin^2=1