Evaluate each of the following:cos2 30° + cos2 45° + cos2 60°+ c

1.	Evaluate each of the following:cos2 30° + cos2 45° + cos2 60°+ cos2 90°
Answer» cos²30° + cos²45° + cos²60°+ cos²90° = \((\frac{\sqrt3}{2})^2\) + \((\frac{1}{\sqrt{2}})^2\) = \((\frac{1}{2})^2\) + (0)² ^{= \(\frac{3}4\) + \(\frac{1}2\) + \(\frac{1}4\) =}^{\(\frac{3}2\)}

Evaluate each of the following:cos2 30° + cos2 45° + cos2 60°+ cos2 90°

Answer»

cos²30° + cos²45° + cos²60°+ cos²90°

= \((\frac{\sqrt3}{2})^2\) + \((\frac{1}{\sqrt{2}})^2\) = \((\frac{1}{2})^2\) + (0)²

^{= \(\frac{3}4\) + \(\frac{1}2\) + \(\frac{1}4\) =}^{\(\frac{3}2\)}