asked 123k views
2 votes
Which expression completes the identity cos u cos v=

asked
User TLE
by
7.7k points

2 Answers

1 vote
cos(u+v) = cosu.cosv - sinu.sinv and cosu.cosv= cos(u+v) + sinu.sinv
or
cos(u - v) = cosu.cosv + sinu.sinv and cosu.cosv= cos(u+v) - sinu.sinv

answered
User Frank Myat Thu
by
8.2k points
7 votes

A is the correct answer.


answered
User Tarps
by
8.0k points

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