A Treatise on Plane TrigonometryUniversity Press, 1891 - 356 sider |
Vanlige uttrykk og setninger
A+B+C a+cos a₁ absolutely convergent algebraical angular points B₁ calculate centre circular functions circular measure coefficients complex quantities continuous function cos² cos³ cosec cosh cosine cotangent deduced denote equal equation escribed circles EXAMPLES expand expression finite formulae fraction geometrical given hence indefinitely infinite series inscribed integer length limiting value logarithms modulus multiple nine-point circle nth roots obtain P₁ pedal triangle perpendicular places of decimals plane positive integer positive or negative principal value Prove quadrilateral r₁ radii radius ratio regular polygon right angles roots sec² shew shewn sides sin² sin³ sine and cosine sinh straight line subtends suppose tan² tangent tanh theorem triangle ABC Trigonometry zero
Populære avsnitt
Side 285 - Show that the perimeter p of a regular polygon of n sides inscribed in a circle of radius R...
Side 182 - The angular elevation of a tower at a place A due south of it is 30° ; and at a place B due west of A, and at a distance...
Side 192 - The three perpendiculars from the vertices of a triangle to the opposite sides (produced if necessary) are called the altitudes...
Side v - These definitions appear to the author to be " those from which the fundamental properties of the functions may be most easily deduced in such a way that the proofs may be quite general, in that they apply to angles of all magnitudes. It will be seen that this method...
Side 237 - N turns is in the foim of a regular polygon of n sides inscribed in a circle of radius R meters.
Side 139 - We have, then, that the sine of an angle is equal to the cosine of its complement, and conversely.
Side 216 - Pro.ve that the equilateral triangle described on the hypotenuse of a right.angled triangle is equal to the sum of the equilateral triangles described on the sides containing the right angle.
Side 182 - ... from another station due west of the former and distant a mile from it is 45° : find the height of the balloon. Ans. 6468 feet. 69. Find the height of a hill, the angle of elevation at its foot being 60°, and at a point 500 yards from the foot along a horizontal plane 30°. Ans. 250V3 yards. 70. A tower 51 feet high has a mark at a height of 25 feet from the ground : find at what distance from the foot the two parts subtend equal angles. Ans. 25V51 feet 71. The angles of a triangle are as 1:2:3,...
Side 40 - The sum of the sines of two angles is equal to twice the product of the sine of half the sum of the given angles into the cosine of half the difference of the given angles.
Side 153 - Law of Sines — In any triangle, the sides are proportional to the sines of the opposite angles. That is, sin A = sin B...