period of cos kx = 2pi/k
so,
2pi/k = 7
k = 2pi/7
period of tan,cot = pi, so
(B)
Which of these functions has period 7?
A)y= cot 7/pi x
B)y= tan pi/7 x
C)y= sin 7/pi x
D)y= cos pi/7 x
1 answer
A)y= cot 7/pi x
B)y= tan pi/7 x
C)y= sin 7/pi x
D)y= cos pi/7 x
1 answer
7 answers
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1 answer