HELP HELP HELP 100PTS sin(x)= - 0.8. If x and y are complementary, what is cos(y)

asked Dec 23, 2020 82.3k views

3 votes

HELP HELP HELP 100PTS
sin(x)= - 0.8. If x and y are complementary, what is cos(y)

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1 vote

Answer:

cos x

Explanation:

Moldovean answered Dec 24, 2020

8.8k points

2 votes

Answer:

Explanation:

$sin (x)=-0.8\\x+y=90\\x=90-y\\sin(90-y)=-0.8\\cos (y)=-0.8\\sin (90-\alpha )=cos\alpha$

Guy E answered Dec 27, 2020

by Guy E

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