3 years ago

PLEASE HELP WORTH 50 POINTS

1 answer:

5 0

Answer:cos( A + B ) = cosAcosB - sinAsinB ;

cos( A + B ) / ( cosAsinB ) = ( cosAcosB - sinAsinB ) / ( cosAsinB ) = ( cosAcosB ) / ( cosAsinB ) - ( sinAsinB ) / ( cosAsinB ) = cosB / sinB - sinA / cosA = cotB - tanA ;

tan²(x) - sin²(x) = sin²(x)/cos²(x) - sin²(x)

… = sin²(x) (1/cos²(x) - 1)

… = sin²(x) (sec²(x) - 1)

… = sin²(x) tan²(x)

Step-by-step explanation:

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Anon25 [30]

$\boxed{\large{\bold{\blue{ANSWER~:) }}}}$

5x+2(2x-23)=-154

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Step-by-step explanation:

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daser333 [38]

9514 1404 393

Answer:

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