SOLUTION: Can someone please help me with this question?! Thank you! If cos(alpha)=0.885 and cos(beta)=0.888 with both angles' terminal rays in Quadrant-I, find the values of a) sin(alpha

Algebra ->  Trigonometry-basics -> SOLUTION: Can someone please help me with this question?! Thank you! If cos(alpha)=0.885 and cos(beta)=0.888 with both angles' terminal rays in Quadrant-I, find the values of a) sin(alpha      Log On


   

Question 1169843: Can someone please help me with this question?! Thank you!
If cos(alpha)=0.885 and cos(beta)=0.888 with both angles' terminal rays in Quadrant-I, find the values of
a) sin(alpha + beta)
b) cos(beta - alpha)
Your answers should be accurate to 4 decimal places.
Answer by Solver92311(821) About Me  (Show Source):
You can put this solution on YOUR website!




Use that to calculate and . Since the sine is positive in QI, select the positive roots.

Then using the values of and with the values of just calculated, calculate the values of





You get to do your own arithmetic.

John

My calculator said it, I believe it, that settles it

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