The number of roots in [-90,90]of equation (1-tanA)(1+tanA)sec 2 A+2 tan^2A

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i think in your question the equation should be compared with 0.If yes please type again and for betterment please attach photo

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The number of roots in [-90,90]of equation (1-tanA)(1+tanA)sec 2 A+2 tan^2A

The number of roots in [-90,90]of equation (1-tanA)(1+tanA)sec²A+2^{tan^2A}

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The number of roots in [-90,90]of equation (1-tanA)(1+tanA)sec 2 A+2 tan^2A

The number of roots in [-90,90]of equation (1-tanA)(1+tanA)sec2A+2tan^2A

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The number of roots in [-90,90]of equation (1-tanA)(1+tanA)sec²A+2^{tan^2A}