Are
(sin3x/sin x cos x)=4 cos x-sec x
and
(sin 3x-sin x)/(cos 3x+cos x)= tan x
identities?

Are
(sin3x/sin x cos x)=4 cos x-sec x
and
(sin 3x-sin x)/(cos 3x+cos x)= tan x
identities?

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use the formulas to find this

sin3x=3sinx-4sin^3

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