“All Students Take Calculus”
Which trigonometric functions are positive in Quadrant I ?
All: sin, cos, tan, csc, sec, cot
“All Students Take Calculus”
Which trigonometric functions are positive in Quadrant II ?
sin, csc
“All Students Take Calculus”
Which trigonometric functions are positive in Quadrant III ?
tan, cot
“All Students Take Calculus”
Which trigonometric functions are positive in Quadrant IV ?
cos, sec
Tangent in terms of sine and cosine


Pythagorean Identity


Pythagorean Identity


Pythagorean Identity


Area of triangle ABC

