Answer
$\frac{\sqrt 2}{2}$
Work Step by Step
Use the Product-Sum formula, we have $sin5^{\circ}cos40^{\circ}+cos5^{\circ}sin40^{\circ}=sin(5+40)^{\circ}=\frac{\sqrt 2}{2}$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 7 - Review - Exercises - Page 579: 53
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
