SOLUTION: If cosα=0.891 and cosβ=0.577 with both angles’ terminal rays in Quadrant-I, find the values of tan(α+β)=
(Your answers should be accurate to 4 decimal p
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-> SOLUTION: If cosα=0.891 and cosβ=0.577 with both angles’ terminal rays in Quadrant-I, find the values of tan(α+β)=
(Your answers should be accurate to 4 decimal p
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Question 1112993: If cosα=0.891 and cosβ=0.577 with both angles’ terminal rays in Quadrant-I, find the values of tan(α+β)=
(Your answers should be accurate to 4 decimal places.) Answer by ikleyn(52898) (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.
