Plane and Spherical Trigonometry

a/sin ABC in example acute angle Algebra angle of elevation arc degrees arithmetic Atan b/sin B₁ C/sin circle common logarithm complex number compute construct the triangle convex triangle cos² cosecant cosh cotangent coterminal denote diedral directed line draw equal equation EXERCISE Find the area Find the distance Find the height formulas Geometry Given Hence horizontal imaginary unit included angle intersections law of cosines law of sines log quotient logarithms measure Multiplying Observe obtain opposite perpendicular plane polar triangle pole polygon principal value Prove quality unit radians radius reciprocal right angles right triangles sec² sin b sin sin² sin³ sinh Solve sphere spherical angle spherical degrees spherical excess spherical triangle Spherical Trigonometry tan² tangent Theorem triedral angle trigonometric lines trigonometric ratios vector vertex vertical ηπ