If ABCD is a cyclic quadrilateral such that
12 tan A - 5 = 0 and 5 cos B +3=0 then
cos C tan D =
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Step-by-step explanation:
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-16/13
Step-by-step explanation:
A + C = 180, B + D = 180
Tan A = 5/12 (where 0 < A < pi/2 and pi/2 < C < pi)
cos B = -3/5 < 0 (where pi/2 < B < pi and 0 < D < pi/2)
Cos C = -12/13; Tan D = 4/3
cos C * Tan D = -12/13 * 4/3 = -16/13
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