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OpenStudy (anonymous):
tanX= -3/4, X lies in Quadrant II, and cosY= 1/3, Y lies in Quadrant I. Find: cos(X+Y)= sin(X+Y)= tan(X+Y)=
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OpenStudy (anonymous):
You have to first find angle x and y You can set up triangles of|dw:1456075283935:dw| for tan and|dw:1456075313514:dw|
OpenStudy (anonymous):
So I would first find the missing sides ( Note: these are right triangles)
OpenStudy (anonymous):
What are they?
OpenStudy (sparrow2):
|dw:1456068109026:dw|
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