This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1890 edition. Excerpt: ... is is negative; tan A, -which is, is negative. IIL "When OP is in the third Quadrant (Fig. H1.) MP is negative, OM is negative, OP is positive. So that, if A be any angle of the third Quadrant, sin A is negative, cos A is negative, tan A is positive. IV. When OP lies in the fourth Quadrant (Fig. 1v.) ...
Read More
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1890 edition. Excerpt: ... is is negative; tan A, -which is, is negative. IIL "When OP is in the third Quadrant (Fig. H1.) MP is negative, OM is negative, OP is positive. So that, if A be any angle of the third Quadrant, sin A is negative, cos A is negative, tan A is positive. IV. When OP lies in the fourth Quadrant (Fig. 1v.) MP is negative, OM is positive, OP is positive. So that, if 4 be any angle of the fourth Quadrant, sin A is negative, cos 4 is positive, tan 4 is negative. 89. The table given below exhibits the results of the last Article. The student should notice that for any particular Quadrant the three sign of sine, cosine, and tangent are unlike their signs for any other Quadrant. EXAMPLES. XX. State the sign of the sine, cosine, and tangent of each of the following angles: 1. CO0.-2. 135. 3. 265. 4. 275.-5.-10. 6.-91. 7.-193. 8.-350. 9.-1000. 10. 2)Mr ] Jir. 11. 2nx + fx. 12. 1riT-ir. 90. The Numer1cal Values through which the Trigonometrical Ratios of the angle ROP pass, as the line OP turns through the first Quadrant, are repeated as OP turns through each of the other Quadrants. Thus as OP turns through the second Quadrant from U to L, Fig. 11. p. 56 (OP being always of the same length) MP and OM pass through the same succession of numerical values through which they pass, as OP turns through the first Quadrant in the opposite direction from U to R. Example 1. Find the sine, cosine and tangent of 120. 120 is an angle of the second Quadrant. Let the angle ROP be 120 (Fig. n. p. 56). Then the angle POL = 180-120=60. MP Hence, sin 120 =-jr = sin 60 numerically, and in the second OP J Quadrant the sine is positive. Therefore sinl200= (i). Again, cos 120 = = cos 60 numerically, and in the second Quadrant the cosine is negative. Therefore cos...
Read Less
Add this copy of Trigonometry for Beginners as Far as the Solution of to cart. $56.29, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
