Question

12) tan 45º - sin2 45° + cos2 45º = ? *
1
Ο Ο Ο
0
O
1
O v3​

Answer 1

Step-by-step explanation:

$tan \: 45 = 1 \\ {sin}^{2}45 = {cos}^{2}45 =( { \frac{1}{ \sqrt[]{2} } })^{2} = \frac{1}{2}$

$1 - \frac{1}{2} + \frac{1}{2} = 1 + 0 = 1$