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Mathematics 19 Online
OpenStudy (anonymous):

help

OpenStudy (anonymous):

write down what sin(a+b) and cos(a+b) to see if either pattern fits. If one does you should be able to reverse that trig identity back to one trig function one angle.

OpenStudy (anonymous):

sin(a+b)=sinaxcosb +cosaxsinb using this formula to solve the problem

OpenStudy (phi):

I think they want you to memorize http://www.mathwarehouse.com/trigonometry/identities/angle-sum-formula.php

OpenStudy (anonymous):

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