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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.
sin(a+b)=sinaxcosb +cosaxsinb using this formula to solve the problem
  • phi
I think they want you to memorize http://www.mathwarehouse.com/trigonometry/identities/angle-sum-formula.php

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can you please type it out i dont understand it
hey plz check the question?
umm why?
becoz the question is wrong
noo
u know this answer
noooooooooooooo
use 6 in place of 7. use this no. to check the question

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