Unformatted text preview: angles to each other.
AB = 20 cm AD = 10 cm ∠ FDC = 18º
Calculate
(a) the height CF
(b) the length of edge DF
(c) ∠ CAD
(d) the length of diagonal AF
(e) ∠ FAC
T The drawing on the right shows a television mast OT
which has 4 staywires fastened to its top (at T)
and to the ground at points A, B, C and D.
ABCD form a square and point O is its centre.
C
B
AD = 32 metres
The angle of elevation of T from A is 57º
O
Calculate (a) distance AO
(b) height of the mast OT
A
D
(c) length of one staywire
(d) angle of elevation of the top of the mast from a point E which midway between C and D. 5. A right squarebased pyramid has a baseedge of
length 17 cm and a perpendicular height of 28 cm.
Calculate
(a) the length of a slant edge
(b) its slant height
(c) the angle between a slant edge and the base
(d) the area of one triangular face sla 4. ed
ge slan ight
t he © Frank Tapson 2004 [trolPT:26] nt perp. height base edge ba se ed ge Trigonometry T/31 (The general angle for sines and cosines)
1 The sine curve –...
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This document was uploaded on 03/01/2014.
 Spring '14

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