SOLUTION: If cosα=0.173 and cosβ= 0.432 with both angles’ terminal rays in Quadrant-I, find the values of
cos(α+β)=
cos(α−β)=
(Your answers shou
Algebra ->
Trigonometry-basics
-> SOLUTION: If cosα=0.173 and cosβ= 0.432 with both angles’ terminal rays in Quadrant-I, find the values of
cos(α+β)=
cos(α−β)=
(Your answers shou
Log On
Question 1112992: If cosα=0.173 and cosβ= 0.432 with both angles’ terminal rays in Quadrant-I, find the values of
cos(α+β)=
cos(α−β)=
(Your answers should be accurate to 4 decimal places.) Answer by ikleyn(52812) (Show Source):
The idea is very simple: having given values of the trig functions, you can and you must calculate values of co-functions;
then apply the addition or subtraction trigonometric formulas/identities.
I think it is totally enough to see ONE TIME how to do it.
After that anyone can solve similar examples on his/(her) own.
