Plane and Spherical Trigonometry

acute angle angle angle of elevation arithmetic base called Check circle compute construct cosē cosh cosine coterminal curve denote difference Dividing draw equal equation example EXERCISE Express figures Find the distance formulas four functions Geometry Given half height Hence horizontal hour identities included increases known less logarithms measure Multiplying negative NOTE Observe obtain opposite plane pole positive principal Prove Putting quadrant quality unit radians radius reciprocal relations represented respectively right angles right triangle roots ship sides sin b sin sinē sine sinh solution Solve sphere spherical triangle star Take tangent third triangle ABC triedral angle trigonometric ratios vertex vertical Write ηπ