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(SinA-CosA)^2 =(1/4)^2
Sin^2A-2sinAcosA+cos^A = 1/16
(Sin^A+cos^2) -2sinAcosA = 1/16
1 -2sinAcosA = 1/16
-2sinAcosA =1/16-1
SinAcosA = 15/32
SecA - cosecA
1/cosA - 1/sinA
= SinA-cosA /sinAcosA
= 1/4 / 15/32
= 32/60= 8/15
Jadi
A. SinA-cosA = 15/32
B.secA-cscA = 8/15