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Question: verify each identity in 6775...

Question details
Verify each identity in #67-75
tan x- 1 sec x 1 +tanX2 cot x 6/) =sin x-cos x cot x -= tan. xsec x 69) = cos x csc x l+cosx sin x tan x sin x 71) 1-sec r cos x-1 sin 72) cos xtan 2 x =- cos a secr 73)cos tan cot x +csc x 74) -= sin x . (cos x + 1 75) cotxsectancsc
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