Google search has mathematical calculation built-in. If you ask it about tan 45, it will show you the result 1.61977519 (not to be confused with asking it about tan 45 degrees).
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Trigonometry
trig·o·nom·e·try
Origin and History
"branch of mathematics that deals with relations between sides and angles of triangles," 1614, from Mod.L. trigonometria (Barthelemi Pitiscus, 1595), from Gk. trigonon "triangle" (from tri- "three" + gonia "angle;" see knee) + metron "a measure" (see meter (2)).
Answers to Which Words 022
Orchiln(c)a violet colouring matter
Patulous (a)open or expanded
Qualm (b)an uneasy feeling
Which Words 023
Retiary (a)shy (b)bent backwards (c)netlike
Sebaceous (a)fatty or greasy (b)slightly oval (c)coming from the sea, as a wind
Tamarau (a)an American larch (b)a mixture of spices (c)a small, sturdy wild buffalo
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