Calciferous Cosine
Geometry
Level
2
\[ \large \cos { \left( \frac { \pi }{ 4 } +x \right) } +\cos { \left( \frac { \pi }{ 4 } -x \right) } =a\]
\[ \large \cos { \left( \frac { 3\pi }{ 4 } +x \right) } -\cos { \left( \frac { 3\pi }{ 4 } -x \right) } =b\]
\({ a }^{ 2 }+{ b }^{ 2 }=\ ?\)
by
shivamani patil