From Förberedande kurs i matematik 1

Revision as of 15:43, 2 April 2008 (edit) Oskar (Talk | contribs) (Ny sida: {{NAVCONTENT_START}} <center> Bild:4_2_1d.gif </center> {{NAVCONTENT_STOP}}) ← Previous diff		Current revision (14:10, 8 October 2008) (edit) (undo) Tek (Talk | contribs) m
(4 intermediate revisions not shown.)
Line 1:		Line 1:
-	{{NAVCONTENT_START}}	+	The side marked ''x'' is the hypotenuse in the right-angled triangle and the side of length 16 is the adjacent to the angle of 20°.
-	<center> [[Bild:4_2_1d.gif]] </center>	+
-	{{NAVCONTENT_STOP}}	+	[[Image:4_2_1_d.gif|center]]
		+
		+	By writing the quotient for <math>\cos 20^{\circ}</math>, we obtain the relation
		+
		+	{{Displayed math||<math>\cos 20^{\circ} = \frac{16}{x}</math>}}
		+
		+	and this gives
		+
		+	{{Displayed math||<math>x = \frac{16}{\cos20^{\circ}}\quad ({}\approx 17\textrm{.}0)\,\textrm{.}</math>}}

---

Current revision

The side marked x is the hypotenuse in the right-angled triangle and the side of length 16 is the adjacent to the angle of 20°.

By writing the quotient for \displaystyle \cos 20^{\circ}, we obtain the relation

\displaystyle \cos 20^{\circ} = \frac{16}{x}

and this gives

\displaystyle x = \frac{16}{\cos20^{\circ}}\quad ({}\approx 17\textrm{.}0)\,\textrm{.}