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  • 25-07-2018
  • Mathematics
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Use basic trigonometric identities to simplify the expression: sin (x) cos (x) sec (x) = ?
a. sin(x) b. tan(x) sec(x) c. sec(x) d. cos(x)

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gmany
gmany gmany
  • 25-07-2018

[tex] \text{Use:}\ \sec(x)=\dfrac{1}{\cos(x)}\\\\\sin(x)\cos(x)\sec(x)=\sin(x)\cos(x)\cdot\dfrac{1}{\cos(x)}=\sin(x)\\\\\text{Answer:}\ a.\ \sin(x) [/tex]

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