Question

Write the value of (1 + tan²A)= cos²A
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Answer 1

Answer:

$1 + {tan}^{2} A = {cos}^{2} A \\ {sec}^{2} A = {cos}^{2} A \\ \frac{1}{ {cos}^{2}A } = {cos}^{2} A \\ {cos}^{4} A = 1 \\A = 0$

Answer 2

Answer:

this is correct........................