Mathematics

Mathematics, 10.07.2019 05:10, Blut07ilove

Establish the identities: (a^2 + b^2) (c^2 + d^2) = (ac plusminus bd)^2 + (ad minusplus bc)^2 and use them to express 481 = (13)(37) as the sum of two squares in two different ways.

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Physics, 19.07.2019 00:10, ozzy55

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Mathematics, 27.08.2019 18:10, hgghukghj1814

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Mathematics, 29.10.2019 23:31, chessacs2950

Verify the identity: (1 + tan^2x)(1 - sin^2x) = 1 i know the solution, but not the steps to get me the answers i need. i will need to know how to do this on my own for a test soon, so any explanations will be appreciated. solution, kinda: (1 + tan^2x)(1 - sin^2x) = sex^2x * cos^2x = 1/cos^2x = 1 here are some identities that i'm pretty sure need to be used, but i'm not sure how or in what context to use them. quotient identities: tan x = (sin x)/(cos x) cot x = (cos x)/(sin x) reciprocal identities: csc x = 1/(sin x) sec x = 1/(cos x) cot x = 1/(tan x) pythagorean identities: sin^2x + cos^2x = 1 sec^2x = 1 + tan^2x csc^2x = 1 + cot^2x any and all will be greatly appreciated!

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Establish the identities: (a^2 + b^2) (c^2 + d^2) = (ac plusminus bd)^2 + (ad minusplus bc)^2 and u...

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