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Mathematics 18 Online
OpenStudy (anonymous):

sec x sin2x is equivalent to.. 1/2, 2cosx, 2,2sinx explain please.

OpenStudy (nubeer):

\[\sec x = \frac{ 1 }{ cosx }\]

OpenStudy (nubeer):

\[\sin2x = 2sinxcosx\]

OpenStudy (nubeer):

now just multiply both of them you will get the answer.

OpenStudy (anonymous):

(1/cosx)(2sinxcosx)

OpenStudy (anonymous):

i dont really know how to multiply, the sin and cos confuse me

OpenStudy (nubeer):

hmmm \[\frac{ 2sinxcosx }{ cosx }\] can you see soemthing common that can be ccancel out?

OpenStudy (anonymous):

oh...that was easy

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