SOLUTION: Can someone please help me with this question?! Thank you! If cos(alpha)=0.228 and cos(beta)=0.836 with both angles' terminal rays in Quadrant-I, find the values of a) cos(alpha

Question 1169844: Can someone please help me with this question?! Thank you!
If cos(alpha)=0.228 and cos(beta)=0.836 with both angles' terminal rays in Quadrant-I, find the values of
a) cos(alpha + beta)
b) sin(alpha + beta)
Your answers should be accurate to 4 decimal places.
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

(1) Given cos(alpha) and cos(beta) and the fact that both angles are in quadrant I, use to find sin(alpha) and sin(beta).

(2)
(3)

You can do the calculations.
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