For an acute angle ,

MATHEMATICS · Single correct · GCSE · Mathematics · Geometry and Measures · Geometry and Measures

Problem

For an acute angle

\alpha

,

\sec \alpha = \dfrac{13}{12}

. What is

\sin \alpha

? (a)

\dfrac{5}{12}

(b)

\dfrac{25}{169}

(c)

\dfrac{5}{13}

(d)

\dfrac{12}{13}

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