MATHS after .5 exams

Terms

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COSINE RULE --3 sides: a^2 = b^2 + c^2 - 2bc COSA
: COS A = (b^2 + c^2 - a^2) / 2bc
Whats the SIN rule?: a/SINA = b/SINB = c/SINC

SINA/a = SINB/b = SINC/c
when is sine rule used: --2 angles 1 side
--2 saides and an angles opp one of them
in triangle ABC, label angles and sides: angle A opp side a
angle B opp side b
angle C opp side c
area of a triangle: .5*a*b*SIN C
sinø? cosø? tanø?: opp/hyp
adj/hyp
opp/adj
secø? cosecø? cotø?: 1/COSø
1/SINø
1/TANø
SIN 45°? COS 45°?: 1/(square root 2)
1/(square root 2)

Number of cards 9

Created By sandle