Share
Explore BrainMass

Trigonometric formulas

Using the exact value cos(pi/4) = 1/square root of 2 and a trigonometric formula, show that

sin (pi/8) = (square root of (2 - Square root of 2)/2.

Using exact value cos(pi/6) = (square root of 3)/2 and a double angle formula to obtain an expression for the exact value of sin(pi/12)

$2.19