If secA+tanA+1=0 then find cos A
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secA+tanA+1=0 then secA-tanA is.
Missing: cos | Must include: cos
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Answer:SecA-tanA = -1Step-by-step explanation:SecA+tanA+1=0=> secA+tanA = -1 ---(1)=> (secA+tanA)(secA-tanA)=-1(secA-tanA)=> sec²A-tan²A = -1(secA-tanA)=>
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