Angle x lies in the first quadrant such that: cosx=3 5 and angle y lies in the second quadrant such that siny= 7 25 Determine an exact value for cos (x−y). *will need to use a compound angle formula
Angle x lies in the first quadrant such that: cosx=3 5 and angle y lies in the second quadrant such that siny= 7 25 Determine an exact value for cos (x−y). *will need to use a compound angle formula
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
Angle x lies in the first quadrant such that:
cosx=3
5
and angle y lies in the second quadrant such that
siny= 7
25
Determine an exact value for cos (x−y).
*will need to use a compound angle formula
Please write clearly thank you.
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