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Sum and Difference in Identities - Trignometry - Practice Problems, Study notes of Trigonometry

Dr. Bhim Rao Ambedkar UniversityTrigonometry

It is the Practice Problems of Trignometry which includes Problems of Statements, Relating Sides and Angles, Single Period Graph, Sum and Difference in Identities, Trignometric Function Values etc. Key important points are: Sum and Difference in Identities, Sides and Angles, Geometric Figures, Division, Double Angle

Typology: Study notes

2012/2013

Uploaded on 02/06/2013

shozab
shozab 🇮🇳

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Trigonometry Chapter 4 Name___________________
Worksheet 4.3
Using the double angle, sum and difference identities to find each of the following given
4
sinx 5
=
and
17
secy 15
=
, x and y are not in quadrant one.
1. sin 2x 2. cos 2y
3. tan 2x 4. sin(x + y)
5. cos(x – y)
Without a calculator, use the sum and difference identities to evaluate the following.
6.
sin165
7.
cos225
pf2

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Trigonometry Chapter 4 Name___________________

Worksheet 4.

Using the double angle, sum and difference identities to find each of the following given

sin x 5

= (^) and

sec y 15

= (^) , x and y are not in quadrant one.

  1. sin 2x 2. cos 2y
  2. tan 2x 4. sin(x + y)
  3. cos(x – y)

Without a calculator, use the sum and difference identities to evaluate the following.

  1. sin

  1. cos 225

Using the double angle, sum and difference identities to find each of the following given

sin x 5

= − and

cot y 3

= , x and y are not in quadrant three.

  1. sin 2y 9. cos 2x
  2. tan 2y 11. sin(x – y)
  3. cos(x + y)

Verify the following identities.

cos sin 2

 −^ = −

14. sin ( π − θ )=sinθ