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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!
asked 96.6k views
5 votes
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!-example-1
asked
User Fhuertas
by
7.8k points

1 Answer

5 votes

Answer:

Explanation:

sin(A)=2/5


cos^2(A) +sin^2(A)=1\\cos^2(A)+[(2)/(5)]^2=1\\cos^2(A)+(4)/(25)=1\\ cos^2(A)=1-(4)/(25)\\ cos^2(A)=(21)/(25)\\ cosA=(√(21) )/(5)

answered
User Sneftel
by
7.2k points
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