Page 130 - Math SL HB Sem 1

g In the triangle PQR PR=5 cxn,
t QR=4 cm and PQ=6 cm,

Calculate

G) the size of PQR ; hnJ' s5.8D (o 413 7a7;ans)

(b) the area of tnanele PQR hvts. 1 q,L utt,

9. Th^e follorving diagram shorvs a triangle ABC. s'here ACB is 90". AB=3. AC=2 and
\ BAC is 6.

j

')
C

I=
(a) Show that sifls = Yl
a

#.
o) Show that ,inZA =
9
hns -l
(c) Find the eract r-alue of cos26,
' q