Name: Hard SAT Math Question 55 — Video Explanation
Uploaded: 2026-07-26
Description: Step-by-step video walkthrough of question 55 from the 100 hardest Digital SAT Math questions.

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Which of the following expressions is equivalent to

(cos 2 3^{\circ}) (sin 6 7^{\circ}) + (sin 2 3^{\circ}) (cos 6 7^{\circ})

2 (cos 2 3^{\circ}) (sin 6 7^{\circ})

2 (cos 2 3^{\circ}) + 2 (cos 6 7^{\circ})

(cos 2 3^{\circ})^{2} + (sin 6 7^{\circ})^{2}

(cos 2 3^{\circ})^{2} + (cos 6 7^{\circ})^{2}

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