BackFind the exact value of each expression. (Do not use a calculator.)
cos(-15°)
Find the exact value of each expression.
sin 255°
Find the exact value of each expression. (Do not use a calculator.)
cos 105° (Hint: 105° = 60° + 45°)
Find the exact value of each expression.
tan 285°
Find the exact value of each expression. (Do not use a calculator.)
cos π/12
Find the exact value of each expression.
sin (13π/12)
Find the exact value of each expression. (Do not use a calculator.)
cos (-7π/12)
Find the exact value of each expression.
tan (5π/12)
Find the exact value of each expression. (Do not use a calculator.)
cos (7π/9) cos (2π/9) - sin (7π/9) sin (2π/9)
Find the exact value of each expression.
sin (π/12)
Write each function value in terms of the cofunction of a complementary angle.
sin 15°
Find the exact value of each expression.
sin (- 5π/12)
Write each function value in terms of the cofunction of a complementary angle.
sin (2π/5)