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AC AC angle of elevation angled plane triangle angled spherical triangle Area Astronomy azimuth body celestial centre circle of altitude colatitude cosB cosec cosine cosp cotangent declination diff Earth ecliptic equal equator feet find AC find angles find the latitude formula given Greenwich height hence horizon hour angle limb log AC log cosec longitude measured meridian altitude Nautical Astronomy object observed par1 parallax Parallel Sailing perpendicular plane sailing point of aries polar dist polar distance polar triangle pole prime vertical prove radius Refraction rhumb line right angled spherical right angled triangle sailing Secant sextant sin a sin sin2 sine sinp sphere spherical triangle ABC Spherical Trigonometry star Subtract both sides Sun's tangent Vernier vers whence yards zen dist zenith distance Zs—Zm
Side 2 - We have, then, that the sine of an angle is equal to the cosine of its complement, and conversely.
Side 113 - Is to the sum of the other two sides, So is the difference of those sides To the difference of the segments of the base.
Side 25 - A straight line is perpendicular, or at right angles, to a plane, when it makes right angles with every straight line meeting it in that plane. 4. A plane is perpendicular...
Side 8 - Formeln cos (a + b) = cos a cos b — sin a sin b, (2) cos (a — b) = cos a cos b + sin a sin b, (3...
Side 42 - The sum of the three sides of a spherical triangle is less than the circumference of a great circle. Let ABC be any spherical triangle; produce the sides AB, AU, till they meet again in D.
Side 26 - THEOREM. Every section of a sphere, made by a plane, is a circle.
Side 128 - ... 24". Required their distance. Ans. 1090.85 yards. 9. From the top of a mountain, three miles in height, the visible horizon appeared depressed 2° 13
Side 25 - The inclination of a plane to a plane is the acute angle contained by two straight lines drawn from any the...