Trigonometry, the easy way /
Downing, Douglas
Trigonometry, the easy way / by Douglas Downing. - 2nd ed. - New York : Barron's Educational Series, 1990. - ix, 310 p. : ill.
Includes index
0812043898
Trigonometry
Trigonometry, the easy way / by Douglas Downing. - 2nd ed. - New York : Barron's Educational Series, 1990. - ix, 310 p. : ill.
Includes index
0812043898
Trigonometry