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Mathcentral.uregina.ca

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Solve sin3x = cos2x - Math Central - University of Regina

Solve sin3x = cos2x - Math Central - University of Regina

If sin3x=cos2x, find the value of x when x<0<90'. Hi Emanuel,. Use the double angle expression for the cosine to write in terms of \sin(x). Write 3x = 2x + x ...Read more

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7x6 by doubling

7x6 by doubling

Can you think of a way to use doubling to multiply 6x7? explain. Hi,. 7 x 6 = 14 x 3 = 14 x (2 + 1) = 14 x 2 + 14 = 28 + 14 = 42. Cheers,Read more

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lim sin 4x/sin 6x as x approaches zero - Math Central

lim sin 4x/sin 6x as x approaches zero - Math Central

Using the chain rule we have (sin 4x)′ = (4x)′ cos(4x) = 4 cos(4x). And the same with the denominator. So lim (sin 4x)′ / (sin 6x)′ = lim [4 cos(4x)] / [6 cos ...Read more

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