Contenu connexe
Plus de Northside ISD (20)
6.4.1 sum and difference formulas
- 1. 6.4 Sum and Difference
Formulas
Using Sum/Difference to Find Exact Values
(Angles Measured in Degrees)
- 2. Sum and Difference Formulas for
Cosine
cos cos cos sin sin
cos cos cos sin sin
- 3. Use Sum Formula to find exact
value cos105 cos 60 45
cos60 cos45 sin60 sin45
1 2 3 2
2 2 2 2
2 6
4 4
1
4 2 6
- 4. Use Difference Formula to find
exact valuecos105 cos 135 30
cos135 cos30 sin135 sin30
2 3 2 1
2 2 2 2
6 2
4 4
1
4 2 6
- 5. Sum and Difference Formulas for
Sine
sin sin cos cos sin
sin sin cos cos sin
- 6. Use Sum Formula to find exact
value sin75 sin 30 45
sin30 cos45 cos30 sin45
1 2 3 2
2 2 2 2
2 6
4 4
1
4 2 6
- 7. Use Difference Formula to find
exact valuesin75 sin 120 45
sin120 cos45 cos120 sin45
3 2 1 2
2 2 2 2
6 2
4 4
1
4 6 2
- 8. Sum and Difference Formulas for
Tangent
tan tan
tan
1 tan tan
tan tan
tan
1 tan tan
- 9. Use Sum Formula to find exact
value tan195 tan 135 60
tan135 tan60
1 tan135 tan60
1 3
1 1 3
1 3
1 3
1 3
1 3
4 2 3
1 3
4 2 3
2
2 3
- 10. Use Difference Formula to find
exact valuetan195 tan 240 45
tan 240 tan 45
1 tan 240 tan 45
3 1
1 3 1
3 1
1 3
1 3
1 3
4 2 3
1 3
4 2 3
2
2 3
- 11. Find the Exact Value
sin65 cos25 cos65 sin25
sin cos cos sin
sin
sin 65 25
sin 90
1
- 12. Find the Exact Value
cos40 cos20 sin40 sin20
cos cos sin sin
cos
cos 40 20
cos 60
1
2