Inactive Tutor answered • 04/21/21
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New to Wyzant
sin A < 0
Use Pythagoras to determine sin A
sin B > 0
Use Pythagoras to determine sin B
Substitute values in appropriate formula.
Emma S.
asked • 04/21/21Precalculus help
If cos A=⅗, A is in quadrant 4, and cos B=⅘, B is in quadrant 1, then sin(A+B) = ____?
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