Plane Trigonometry

acute angle angle of elevation angles or numbers angular Arccos Arcsec Arcsin Arctan called central angle circle complex numbers computation Consequently cos² csc² decimal point direction distance domain elements equal equation EXAMPLE EXERCISE express Find the length find the value formula Furthermore given Hence horizontal identity integer intercept interpolation inverse function inverse trigonometric function law of cosines law of sines law of tangents logarithm mantissa Mollweide's equations multiple negative obtain ordered pairs perpendicular problems 17 problems 25 Pythagorean theorem quadrant quotient r(cos radians radius vector real numbers reference position right triangle scientific notation sec² significant digits significant figures Sin-¹ sin² sketch the graph solution set standard position symmetrical with respect symmetry tan² tangent terminal side theorem trigonometric function value trigonometric ratios units X-axis zero