4.Findxin the diagram in three different ways. You do not need to calculate the value ofx, just write
down the appropriate ratio forx.
j8 9x5.Which of these statements is true about△P QR?
PR Qrpqa)sinR^=p
q
b)tanQ^=r
p
c)cosP^=r
q
d)sinP^=p
r6.Sarah wants to find the value of in the triangle below. Which statement is a correct line of working?
j8 9a)sin =^45 b)cos( 3
5)
= c)tan =^54 d)cos0,8=
7.Explain what is wrong with each of the following diagrams.
a)R8Rk
x114 5.3. Defining the trigonometric ratios