Question

What is the value of cos2 45° + sin2 45° ?​

Answer 1

$cos45 = \frac{1}{ \sqrt{2} } \\ sin45 = \frac{1}{ \sqrt{2} }$

Therefore,

${cos}^{2} 45 + {sin}^{2} 45 \\ = { (\frac{1}{ \sqrt{2} }) }^{2} + {( \frac{1}{ \sqrt{2} }) }^{2} \\ = \frac{1}{2} + \frac{1}{2} = 1$

Answer 2

Answer:

cos2 45° + sin2 45° = 1

HOPE IT HELPS U !!!!!!!!!!!!1

Step-by-step explanation:

1/2 +1/2 = 1

i.e. cos2 45° = 1/2

    sin2 45° = 1/2