Herrera Erickson
04/30/2024 · Primary School
(4) \( \operatorname{sen}\left(30^{\circ}+p\right)-\cos \left(60^{\circ}+p\right)=\sqrt{3} \operatorname{sen} \beta \)
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Step-by-step Solution
To solve the equation
\[
\operatorname{sen}\left(30^{\circ}+p\right)-\cos \left(60^{\circ}+p\right)=\sqrt{3} \operatorname{sen} \beta,
\]
we start by simplifying the left-hand side.
1. **Use trigonometric identities**:
- Recall that \(\cos(60^\circ) = \frac{1}{2}\).
- Therefore, \(\cos(60^\circ + p) = \cos(60^\circ)\cos(p) - \sin(60^\circ)\sin(p) = \frac{1}{2}\cos(p) - \frac{\sqrt{3}}{2}\sin(p)\).
2. **Substituting into the equation**:
The left-hand side becomes:
\[
\operatorname{sen}(30^\circ + p) - \cos(60^\circ + p) = \sin(30^\circ)\cos(p) + \cos(30^\circ)\sin(p) - \left(\frac{1}{2}\cos(p) - \frac{\sqrt{3}}{2}\sin(p)\right).
\]
Since \(\sin(30^\circ) = \frac{1}{2}\) and \(\cos(30^\circ) = \frac{\sqrt{3}}{2}\), we have:
\[
\frac{1}{2}\cos(p) + \frac{\sqrt{3}}{2}\sin(p) - \left(\frac{1}{2}\cos(p) - \frac{\sqrt{3}}{2}\sin(p)\right).
\]
3. **Combine like terms**:
\[
\frac{1}{2}\cos(p) + \frac{\sqrt{3}}{2}\sin(p) - \frac{1}{2}\cos(p) + \frac{\sqrt{3}}{2}\sin(p) = \sqrt{3}\sin(p).
\]
4. **Setting the equation**:
Now, we have:
\[
\sqrt{3}\sin(p) = \sqrt{3}\sin(\beta).
\]
5. **Dividing both sides by \(\sqrt{3}\)** (assuming \(\sqrt{3} \neq 0\)):
\[
\sin(p) = \sin(\beta).
\]
6. **Finding the general solution**:
The solutions to \(\sin(p) = \sin(\beta)\) are given by:
\[
p = \beta + n\cdot 360^\circ \quad \text{or} \quad p = 180^\circ - \beta + n\cdot 360^\circ,
\]
where \(n\) is any integer.
Thus, the final solutions for \(p\) are:
\[
p = \beta + n\cdot 360^\circ \quad \text{or} \quad p = 180^\circ - \beta + n\cdot 360^\circ, \quad n \in \mathbb{Z}.
\]
Quick Answer
The solutions for \(p\) are \(p = \beta + n\cdot 360^\circ\) or \(p = 180^\circ - \beta + n\cdot 360^\circ\), where \(n\) is any integer.
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