{ If }\operatorname{cos}^2A-\operatorname{sin}^2A=\operatorname{tan}^2C, then }\operatorname{cos}^2C-\operatorname{sin}^2C is }} equal to }{ (1) }\operatorname{tan}^2C}{ (2) }\operatorname{tan}^2A}{ (3) }\operatorname{cot}^2A}{ (4) }\operatorname{cot}^2C

{ If }\operatorname{cos}^2A-\operatorname{sin}^2A=\operatorname{tan}^2

1.	{ If }\operatorname{cos}^2A-\operatorname{sin}^2A=\operatorname{tan}^2C, then }\operatorname{cos}^2C-\operatorname{sin}^2C is }} equal to }{ (1) }\operatorname{tan}^2C}{ (2) }\operatorname{tan}^2A}{ (3) }\operatorname{cot}^2A}{ (4) }\operatorname{cot}^2C
Answer» { If }\operatorname{cos}^2A-\operatorname{sin}^2A=\operatorname{tan}^2C, then }\operatorname{cos}^2C-\operatorname{sin}^2C is }} equal to }{ (1) }\operatorname{tan}^2C}{ (2) }\operatorname{tan}^2A}{ (3) }\operatorname{cot}^2A}{ (4) }\operatorname{cot}^2C