SAT Math Trigonometry Problem

SAT Math Tutorial

SAT Math Trigonometry Problem


This problem demonstrates many of the important trigonometry principles that are essential to master for the math portion of the SAT. I look forward to helping your child master these core principles, and to helping them reach their academic goals.

Sample Problem

In a right triangle, one angle measures x degrees, where sin x = 4/5. What is the cos(90-x)?


According to the complementary angle relationship for sine and cosine, the sin(x) = cos(90-x), and so cos(90-x) = 4/5. The correct answer for this question is 0.8.

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