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Troyanec [42]
4 years ago
9

Help verify each identity

%3A%20tan%20%5C%3A%20x%7D%20%20%3D%20cos%20%5C%3A%20x" id="TexFormula1" title=" \frac{csc}{cot \: x \: + \: tan \: x} = cos \: x" alt=" \frac{csc}{cot \: x \: + \: tan \: x} = cos \: x" align="absmiddle" class="latex-formula">
Computers and Technology
1 answer:
CaHeK987 [17]4 years ago
3 0

cot x = cos x / sin x

tan x = sin x / cos x

(Find common denominators)

cosx/sinx * cosx/cosx = cos^2x/sinxcosx

sinx/cosx * sinx/sinx = sin^2x/sinxcosx

(Now we can combine them)

csc / (sin^2x+cos^2x / sinxcosx)

(Simplify)

csc*sinx*cosx / sin^2x+cos^2x

sin^2x + cos^2x = 1

csc*sinx*cosx / (1)

csc*sinx*cosx

csc = 1/sinx

1/sinx*sinx = 1

(1)*cosx = cosx


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