Asked by AlexMaths
if sinA=-(12/13) and -90<A<0, find without using calcuator, the value of cot(90-A)
Answers
Answered by
Steve
Just draw your 5-12-13 triangle in standard position
cot(90-A) = tan(A) = y/x = -12/5
cot(90-A) = tan(A) = y/x = -12/5
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