Question

Cos square a (1+tan square a) is

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

${cos}^{2} a \: (1 + {tan}^{2} a) \\ = {cos}^{2} a \times {sec}^{2} a = \\ = {cos}^{2} a \times \frac{1}{ {cos}^{2} a} \\ = 1$