Prove the identity. sin (x+y) - sin (x-y)=2 cósx siny Note that each Statement must be based on a Rule chosen from the Rule menu. To see a detailed description of a Rule, select the More Information B the right of the Rule.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 21E
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Prove the identity.
sin (x+y)- sin (x-y) = 2 cósx siny
Note that each Statement must be based on a Rule chosen from the Rule menu. To see a detailed description of a Rule, select the More Information Button to
the right of the Rule.
Statement
Rule
sin (x + y) - sin (x - y)
cos
Osin O
Otan O
Select Rule
O cotO
OsecO
Csc
%D
Validate
JT
()
Transcribed Image Text:Prove the identity. sin (x+y)- sin (x-y) = 2 cósx siny Note that each Statement must be based on a Rule chosen from the Rule menu. To see a detailed description of a Rule, select the More Information Button to the right of the Rule. Statement Rule sin (x + y) - sin (x - y) cos Osin O Otan O Select Rule O cotO OsecO Csc %D Validate JT ()
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