Page 125 - Math SL HB Sem 1

Parl Yra's (v6rfivr'rs Cr,to,'r)

l. I Maximum mark: 6J

q\ Let p-sin 40. and q:q651 I 0.. Give your answers to the following in terms of p and/or q.

(a) Write down an expression for
(i) sinl40"; [2 marl<sJ
(ii) cos70". A"s: p
hr1t .- - rL.
(b) Find an expression for cosl40..
I J tLtrk\ f hrt, a4" I

c) Find an expression for tan
$.. [1 nark I h'ttS , Y
2L'-t

a - [Maximun mark: 6]

\ I ''t : a tol "A -l
(a) Cnven that ao.r= and0(. -l S fild cos2..1 ftas
I -, [3 rnarksJ

.'k/q
1-
(b) Gir,ren that .r"B=i arr,l 1< J;
32 B<r,6rrd cosg. Arts ' [3 norilJ
5

3 , [Maximnn mark: 6J

The^dragram belorv shows rriangle peR
tg is l0cm, aad PeR is 75' The leagth of [pe] is 7 cm, the length of [pR]
\

diogr.fl r nol lo
7
scole

P
l0 cm R
G) Find pRe, +L'to
Anr' [3 rnarksJ

O) Find the area of triangle peR. hn,' jr ' o cn"
[3 narbJ