Plane Trigonometry, Surveying and TablesGinn, 1903 - 336 σελίδες |
Άλλες εκδόσεις - Προβολή όλων
Plane Trigonometry, Surveying and Tables George Albert Wentworth Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
9 1 log 9 log ABCD abscissa acres acute angle angle of elevation colog cologarithm column compass Compute cos log cot cos x cos(x cos² cosecant cot tan cot cotangent difference equal equation EXERCISE feet field notes Find the angle Find the area Find the distance Find the height Find the value formulas functions Given Hence horizontal plane hypotenuse included angle inscribed instrument Law of Sines length log cos 9 log cot log log tan log logarithm loge longitude mantissa measure meridian miles needle negative parallel perpendicular plot positive Quadrant radians radius regular polygon right triangle Sect SECTION ship sails sides sight sin log tan sin² sin²x sine and cosine station subtract Surveying tangent telescope transit TRIGONOMETRIC unit circle vernier vertical
Δημοφιλή αποσπάσματα
Σελίδα 66 - Cosines may be stated as follows : The square of any side of a triangle is equal to the sum of the squares of the other two sides diminished by twice their product into the cosine of the included angle. SECTION XXXVI LAW OF TANGENTS By Sect. XXXIV, p. 64, a : b = sin A : sin B...
Σελίδα 65 - The sides of a triangle are proportional to the sines of the opposite angles.
Σελίδα 200 - ... around the field ; hence, we move just as far north as south. Therefore, the sum of the northings should equal the sum of the southings. In like manner, the sum of the eastings should equal the sum of the westings.
Σελίδα 67 - The bisector of an angle of a triangle divides the opposite side into segments proportional to the adjacent sides.
Σελίδα 27 - TRIANGLE The area of a triangle is equal to one-half the product of the base by the altitude ; therefore, if a and b denote the legs of a right triangle, and F the area, F = \ ab.
Σελίδα ii - If the number is less than 1 , make the characteristic of the logarithm negative, and one unit more than the number of zeros between the decimal point and the first significant figure of the given number.
Σελίδα 92 - A pole is fixed on the top of a mound, and the angles of elevation of the top and the bottom of the pole are 60° and 30° respectively. Prove that the length of the pole is twice the height of the mound.
Σελίδα 31 - From the top of a hill the angles of depression of two successive milestones, on a straight level road leading to the hill, are observed to be 5° and 15°.
Σελίδα 55 - Formula [2], sin (x + y) _ sin x cos y + cos x sin y '
Σελίδα vi - The difference between the two adjacent mantissas is 7, and the difference between the corresponding numbers is 1. The difference between the smaller mantissa, 82321, and the given mantissa, 82326, is 5. Therefore, the number to be annexed to 6656 is f of 1 = 0.7, and the fifth significant figure of the required number is 7.