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Whats sine of 35 Degrees= Opposite/Hypotenuse
=2.8/4.9
=0.57 |
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| 4, reciprical identities, even/odd, quotient, pythagorem therom, |
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| sin(theta)= 1/cos(theta), etc. |
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Cos(-Theta)=cos(Theta)<-- cos,sec are even
Sin(-Theta)= -sin(Theta)<-- sin,csc,tan
Tan(-Theta) = -tan(Theta)<-- cot, are odd |
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Tan(Theta)= sin(Theta)/cos(Theta)
Cot(Theta)= cos(Theta)/sin(Theta) |
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| Pythagorem Theorm Identity |
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Sin^2(Theta)+cos^2(Theta)=1
Tan^2(Theta)+1=sec^2(Theta)
1 + cot^2(Theta) = csc^2(Theta) |
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| always acute except for right angles,anyh angle (Theta) can be compared with an acute(or right) reference angle (theta Prime) |
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| acute angle between theta and x-axis |
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