Algebra Archive: Questions from July 28, 2023
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3. Determine the exact value of each trigonometric expression. a) \( \sin 45 \cdot \cos 45-\sin 30 \cdot \cos 30 \) b) \( \sin 45 \cdot \cos 30+\sin 60 \cdot \cos 45 \) c) \( \tan ^{2}(30)-\cos ^{2}(42 answers