PUse identities to simplify each expression. sec2 (x) -cot^2(x) %3D tan (x) cos? sin(x) + = csc(x) sin(r) sin (x) – cos (r) = | %3D
PUse identities to simplify each expression. sec2 (x) -cot^2(x) %3D tan (x) cos? sin(x) + = csc(x) sin(r) sin (x) – cos (r) = | %3D
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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For the last one, -cos(2x) is my answer but it’s wrong and this what my teacher said..
The first two are correct, but in the last one, it does not want "double" angle 2x. Use double angle identities for - cos(2x) to write it in single angle x.
Transcribed Image Text:Use identities to simplify each expression.
sec2 (x)
1-
tan (x)
cos x)
= -cot^2(x)
%3D
sin(r) +
= csc(x)
%3D
sin(x)
sin (x) – cos (x) = |
%3D
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