64 577
Assignments Done
Successfully Done
In September 2018

Answer to Question #31907 in Trigonometry for Kristen Woods

Question #31907
If sin x = 0.20, cos x = .98, sin y = .12, and cos y = .99, which of the following is cos(x + y)?

A. -.94
B. -.95
C. .96
D. .95
Expert's answer
As cos(x+y)=cos(x)cos(y)-sin(x)sin(y) we obtain that cos(x+y)=0.99*0.98-0.2*0.12=0.9462. So, the answer is D.

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


No comments. Be first!

Leave a comment

Ask Your question

Privacy policy Terms and Conditions