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Math · Trigonometry
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Verify each identity in #12-25
cot x sec x. cos x tan x 1 +tan x 13) cos x + sin x sec r csc x1 sinx 15)--= tan x tan x tan x sinx csc x cot x 17) -cos xtan x =-sin x 16) sin x1 18) csc x+1= sin. csc x+1=sin x . (sin x + 1) 19) csc x cos x 1-cos x 20) sec x- cotxcosx-sin x tan cos x sec x cot χ 22) 23) csex (esex-1sin 23) csc x . (csc x-1 )--sin x sinx 24) cse xcosx t(os) 24) csc xcos x cotx- sin x csc r COS x 25) sec x sinx
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