Saved Bookmarks
| 1. |
( \frac \operatorname sin 77 ^ \circ \operatorname cos 13 ^ \circ ) ^ 2 %2B ( \frac \operatorname cos 77 ^ \circ \operatorname sin 13 ^ \circ ) ^ 2 - 2 \operatorname cos ^ 2 45 ^ \circ |
| Answer» | |