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10 Cards in this Set
- Front
- Back
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Prove:
sin²Ø + cos²Ø=1 |
(y/r)² + (x/r)²
y²/r² + x²/r² y²x²/r² |
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Prove
cscx tanx = secx |
r/y · y/x = r/x
r/x = r/x |
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sin Ø = y/r
cos Ø = x/r tan Ø = y/x |
cot Ø = x/y
sec Ø = r/x csc Ø = r/y |
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sin (α + β)=
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sin(α)cos(β)+cos(α)sin(β)
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cos (α + β) =
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cos (α) cos (β) - sin (α) sin (β)
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Law of sine formula
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a/sin(α) = b/sin(β)=c/sin(ϒ)
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law of cosine formula
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a²=b²+c²-2bc cos(A)
b²=a²+c²-2ac cos(B) c²=a²+b²-2ab cos(C) |
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sinØ=
cosØ= |
Opposite side/hypotenuse
adjacent side /hypotenuse |
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Rules for solving problems in quadrants
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1) if answer is in QI stay the same
2) if QII you (180-Ø) 3) if QIII you (180+Ø) 4) if QIV you (360-Ø) |
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y=A sin(Bx+C) or y=A cos (Bx+C)
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Amplitude: IAI=A
Period: 2∏/B=2∏/1=2∏ Phase shift: C/B=0/1=0 |
