Cos² 45° + cos² 60° × tan² 60° Tolong jawab kak Minta tolong banget

Cos² 45° + cos² 60° × tan² 60°

= (½√2)² + (½)² × (√3)²

= ¼.2 + ¼ × 3

= 2/4 + 3/4

= 7/4