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Charles W.

asked • 06/10/15

Maths questions On Trigonometry and functions....

If 0≤α≤π and 0≤β≤π meets α+β=2/3π and sin α=2sinβ,the value of tan(α-β)=...

A.1
B.square root 2
C.2-(square root 3)
D.square root 3
E.2+(square root 3)

A function f(x)=4x^3-18x^2+15x-20 is maximum on x=...

A.1/2
B.1 1/2
C.2
D.2,5
E.3

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