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resentation Maths Edexcel AS and A level Mathematics Pure

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Document about Trig-Identities-and-Equations pure maths year 1 AS

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  • July 7, 2021
  • 37
  • 2020/2021
  • Presentation
  • Unknown
  • Secondary school
  • Other
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Trig Identities
and Equations
Twitter: @Owen134866

www.mathsfreeresourcelibrary.com

, Prior Knowledge Check

1a) Sketch the graph of for 3) Solve these equations


b) How many solutions are there to a)
the equation in the range ?
1, 3
4 write down
c) Given that (to 3sf), b)
three other solutions to the
equation
1, -9

c)
143.1, 396.9, 503.1
2) Solve the equation
3 ± √ 65
4
-44.4

,Teachings For
Exercise 10A

, Trig Identities and Equations
You need to understand how to
use the trig graphs to find other y y = sinθ
values of sine, cosine or tan -40 -40
1
50 130
You need to be able to work out
larger values of sin, cos and tan as
acute angles (0º - 90º) 0 θ
90º 180º 270º 360º


 Write sin 130º as sine of an acute -1
angle


(sometimes asked as a
‘trigonometric ratio’)
 Draw a sketch of the graph
Sin 130º = Sin 50º  Mark on 130º
 Using the fact that the graph has symmetry, find an
acute value of θ which has the same value as sin 130


10A

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