Question

Evaluate 4cos3 45° - 3cos45° + sin45°

Answer 1

Step-by-step explanation:

Trigonometry....... =___=

4cos^3 45° - 3cos45° + sin45°

$\frac{4}{2 \sqrt{2} } - \frac{3}{ \sqrt{2} } + \frac{1}{ \sqrt{2} }$

$\frac{4}{2 \sqrt{2} } - \frac{2}{ \sqrt{2} }$

$\frac{4}{2 \sqrt{2} } - \frac{4}{2 \sqrt{2} }$

$0$