With your palm facing you, count off the basic reference angles, starting with your thumb: 0°, 30°, 45°, 60°, and 90°. To find a trig value, you'll lower the finger corresponding to that angle, keeping your palm facing you.
For the sine value, you'll take the square root of the number of fingers to the left of the lowered finger, and divide by 2.
For the cosine value, you'll take the square root of the number of fingers to the right of the lowered finger, and divide by 2.
For the tangent, you'll divide the number of fingers to the left by the number to the right and take the square root of that fraction.
For the sine value, you'll take the square root of the number of fingers to the left of the lowered finger, and divide by 2.
For the cosine value, you'll take the square root of the number of fingers to the right of the lowered finger, and divide by 2.
For the tangent, you'll divide the number of fingers to the left by the number to the right and take the square root of that fraction.
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