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SUM AND DIFFERENCE FORMULAS (1. THE COSINE OF THE SUM AND DIFFERENCE OF…
SUM AND DIFFERENCE FORMULAS
1. THE COSINE OF THE SUM AND DIFFERENCE OF TWO ANGLES
1.1 PROVING :
http://gg.gg/provecosinesumanddiff
Example 1: find value of
answer :
http://gg.gg/soltrig1
Example 2: Find the exact value of
answer:
http://gg.gg/soltrig2
example 3: verify the identity
answer:
http://gg.gg/soltrig3
Problem 1: (1) Fnd value of
(2) find value
(3)verify identity
2. THE SINE OF THE SUM AND DIFFERENCE OF TWO ANGLES
2.1 PROVING :
http://gg.gg/provingtrigsine
example 4: find value of
answer:
http://gg.gg/solex4
example 5:
http://gg.gg/example7
answer:
http://gg.gg/answerex5
3. SUM AND DIFFERENCE FORMULAS FOR TANGENTS
FORMULAS:
3.1 Verify identity
example 6: find value of
example 7: find value of
for
http://gg.gg/questan
