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1. sec 0° + sec 45°
2. Sin 60° × sin 60° + sin 30° × sin 30°
1. sec 0° + sec 45°
2. Sin 60° × sin 60° + sin 30° × sin 30°
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2. Sin 60° × sin 60° + sin 30° × sin 30°
= 1/2 √3 × 1/2 √3 + 1/2 × 1/2
= 3/4 + 1/4
= 4/4
= 1
semoga membantu ya :)