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Remember: SOH CAH TOA
(a)
sin A = 3/5 (Opposite/Hypotenuse)
cos A = 4/5 (Adjacent/Hypotenuse)
tan A = 3/5 (Opposite/Adjacent)
csc A = 5/3 (1/sinA)
sec A = 5/4 ( 1/ cosA)
cot A = 5/3 (1/tanA)
(b)
sin C = 4/5 (Opposite/Hypotenuse)
cos C = 3/5 (Adjacent/Hypotenuse)
tan C = 4/3 (Opposite/Adjacent)
csc C = 5/4 (1/sinA)
sec C = 5/3 ( 1/ cosA)
cot C = 3/4 (1/tanA)