CSEC Additional Mathematics · 2013 · Paper 1 · Question Q31
\sin(\alpha + 45^\circ) is equal to
- (A)
\frac{1}{\sqrt{2}}(\sin \alpha + \cos \alpha) - (B)
\frac{1}{\sqrt{2}}(\cos \alpha - \sin \alpha) - (C)
\frac{1}{2}(\sin \alpha - \cos \alpha) - (D)
\frac{1}{2}(\cos \alpha - \sin \alpha)
The answer is shown once you've answered.
Practise this question