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Mathematics 11 Online
OpenStudy (dtan5457):

Can someone explain this rule to me and give me examples? (trig)

OpenStudy (dtan5457):

OpenStudy (dtan5457):

@SolomonZelman

OpenStudy (dtan5457):

@Directrix

OpenStudy (dtan5457):

@Jhannybean

OpenStudy (alyssa_xo):

sin(90-theta) = cos(theta)

OpenStudy (alyssa_xo):

I don't remember the subtraction/addition formulas so I assume this is correctly proven https://answers.yahoo.com/question/index?qid=20090429012702AA6ZWCf

Directrix (directrix):

"Co" is for complementary. I think about it like this: |dw:1424918688535:dw|

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