Gina051819 Gina051819

11-09-2022
Mathematics

contestada

HELP ASAP I WILL GIVE 30 points to whoever can show their work!

HELP ASAP I WILL GIVE 30 points to whoever can show their work class=

Respuesta :

phallysovanvotey9168 phallysovanvotey9168

11-09-2022

Answer:

Step-by-step explanation:

sin(A)=2/5

[tex]cos^2(A) +sin^2(A)=1\\cos^2(A)+[\frac{2}{5}]^2=1\\cos^2(A)+\frac{4}{25}=1\\ cos^2(A)=1-\frac{4}{25}\\ cos^2(A)=\frac{21}{25}\\ cosA=\frac{\sqrt{21} }{5}[/tex]

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