Trigonometric Ratios

Trigonometric Ratios

sin (90° + θ) = cos θ

cos (90° + θ) = – sin θ

tan (90° + θ) = – cot θ

csc (90° + θ) = sec θ

sec ( 90° + θ) = – csc θ

cot ( 90° + θ) = – tan θ

sin (90° – θ) = cos θ

cos (90° – θ) = sin θ

tan (90° – θ) = cot θ

csc (90° – θ) = sec θ

sec (90° – θ) = csc θ

cot (90° – θ) = tan θ