## Plane and Spherical Trigonometry |

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### Common terms and phrases

abscissa acute angle angle base called cd log changes Check Choose circle complete Computation Construct coördinates corresponding cosine cota decimal definition determined difference direction distance Dividing Draw equal equation Example EXERCISES Express figures Find the value formulas four fourth Given gives greater height horizontal hour identities included initial side intersecting length less log cos logarithms mantissa means measure miles minutes multiple natural negative opposite origin places plane Plot positive Proof Prop Prove quadrant radians radius ratio relations represented respectively right triangle root rule segment shown sine Solution Solve spherical triangle square Substituting subtracted taken tangent terminal side theorem third tion triangle trigonometric functions unit values vector vertical written

### Popular passages

Page 4 - Every circumference of a. circle, whether the circle be large or small, is supposed to be divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds.

Page 141 - The cube root of a number is one of the three equal factors of the number. Thus the cube...

Page 15 - To Divide One Number by Another, Subtract the logarithm of the divisor from the logarithm of the dividend, and obtain the antilogarithm of the difference.

Page 103 - Law of Sines — In any triangle, the sides are proportional to the sines of the opposite angles. That is, sin A = sin B...

Page 8 - When the number is greater than 1, the characteristic is positive, and is one less than the number of digits to the left of the decimal point...

Page 17 - To find any power of a given number, multiply the logarithm of the number by the exponent of the power. The product is the logarithm of the power.

Page 112 - In every plane triangle, the sum of two sides is to their difference as the tangent of half the sum of the angles opposite those sides is to the tangent of half their difference.

Page 6 - In it the right angle is divided into 100 equal parts called grades, the grade into 100 equal parts called minutes, and the minute into 100 equal parts called seconds.

Page 163 - Spherical Triangle the cosine of any side is equal to the product of the cosines of the other two sides...

Page 16 - The logarithm of the reciprocal of a number is called the Cologarithm of the number.