Jambmaths question:
If $\sin \theta =\tfrac{12}{13}$ find the value of $1+\cos \theta $
Option A:
$\tfrac{18}{13}$
Option B:
$\tfrac{8}{13}$
Option C:
$\tfrac{5}{13}$
Option D:
$\tfrac{25}{13}$
Jamb Maths Solution:
$\begin{align} & \sin \theta =\frac{12}{13},\text{ }\cos \theta =\frac{5}{13} \\ & 1+\cos \theta =1+\frac{5}{13}=\frac{18}{13} \\\end{align}$
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