can anyone solve this question
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Answer:
(secA-tanA
Step-by-step explanation:
(secA+tanA) (secB+tanB) (secC+tanC) =
(secA-tanA) (secB-tanB) (secC-tanC)
multiple by,
(secA-tanA) (secB-tanB) (secC-tanC) both sides
(secA+tanA) (secB+tanB) (secC+tanC)(secA-tanA) (secB-tanB) (secC-tanC) =(secA-tanA)² (secB-tanB)² (secC-tanC) ²
(sec²A-tan²A) (secB-tanB²B) (sec²C-tan²C)
=(secA-tanA)² (secB-tanB)² (secC-tanC) ²
[(secA-tanA) (secB-tanB) (secC-tanC) ]²=1
(secA-tanA) (secB-tanB) (secC-tanC) =±1,
now therefore
(secA+tanA) (secB+tanB) (secC+tanC)=±1
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