📏 trigonometry
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Cosine Graph B242Ee
1. **State the problem:** We want to graph one period of the function $$y = -3 \cos\left(\frac{1}{2}(x - \frac{\pi}{3})\right) + 1$$ and understand how to move the graph horizontal
Sec Tan Value B52C66
1. **Problem statement:**
(ক) Given that $\sec A - \tan A = \frac{2}{5}$, find the value of $\sec A + \tan A$.
Sec Tan Value 77D07C
1. **Problem statement:** Given $\sec A - \tan A = \frac{5}{2}$, find the value of $\sec A + \tan A$.
2. **Formula and important rule:** Use the identity:
Tan Complement B31D77
1. **State the problem:** We need to solve the equation $\tan(90^\circ - \theta) = \frac{5}{3}$ for $\theta$.
2. **Recall the formula and identity:** The tangent of the complement
Third Quadrant Angle Aaaca4
1. The problem asks why the angle in the third quadrant is expressed as $180^\circ + \alpha$ instead of $\alpha - 180^\circ$.
2. In trigonometry, angles are measured from the posit
Solve Sine Equation Cfcafb
1. **State the problem:** Solve the equation $$\sqrt{10}\sin(\theta - 71.56) = -2$$ for $$\theta$$ in the interval $$0 \leq \theta \leq 360$$ degrees.
2. **Analyze the equation:**
Solve Sine Equation 970767
1. **State the problem:** Solve the equation $$\sqrt{10}\sin(\theta - 71.56) = -2$$ for $\theta$.
2. **Recall the range of sine function:** The sine function $\sin(x)$ always satis
Sin Sum Right 623B39
1. نبدأ ببيان المشكلة: لدينا مثلث قائم الزاوية بزوايا أ، ب، ج، ونريد إيجاد قيمة \(\sin(A+B)\).
2. في مثلث قائم الزاوية، مجموع الزوايا الداخلية يساوي 180 درجة، وزاوية واحدة تساوي 90
Sin Cos Sum 89B7A6
1. **Problem:** Evaluate $\sin^2(60^\circ) + \cos^2(60^\circ)$.
2. **Formula and rule:** The Pythagorean identity states that for any angle $\theta$,
Triangle Area 9Ff252
1. مسئله: مثلثی با زاویه $\theta$ که کمتر از 90 درجه است داده شده است. طول ضلع مقابل به زاویه $\theta$ برابر 3 است و مقدار $\cos \theta$ برابر 1/25 است. هدف یافتن مساحت مثلث است.
2
Min Value Sine 751249
1. مسئله: یافتن کمترین مقدار ممکن برای عبارت $$2 - 5\sin(\theta)$$.
2. فرمول و قوانین مهم: تابع سینوس $$\sin(\theta)$$ مقداری بین $$-1$$ و $$1$$ دارد.
Min Value Sine 9Cf171
1. مسئله: کمترین مقدار تابع $$2 - 5\sin\theta$$ را پیدا کنید.
2. فرمول و قوانین مهم: تابع مورد نظر به صورت $$f(\theta) = 2 - 5\sin\theta$$ است. تابع سینوس $$\sin\theta$$ مقداری بین
Simplify Expression 73Be33
1. The problem is to simplify the expression $2 - 5\sin x$.
2. This expression is already in its simplest form because it is a linear combination of a constant and the sine functio
Minimum 2 5Sinx 99436A
1. مسئله: کمترین مقدار تابع $$2 - 5\sin x$$ را پیدا کنید.
2. فرمول و قواعد مهم: تابع سینوس $$\sin x$$ مقداری بین $$-1$$ و $$1$$ دارد، یعنی $$-1 \leq \sin x \leq 1$$.
Sin Cos Square 65A72C
1. مسئله: مقدار $\sin^2 20^\circ + \cos^2 20^\circ$ را بیابید.
2. فرمول اصلی: یکی از هویتهای بنیادی مثلثاتی این است که برای هر زاویه $\theta$ داریم:
Sin Cos Cubes A86Eb5
1. **State the problem:** Calculate $\sin^3 70^\circ + \cos^3 70^\circ$.
2. **Use the sum of cubes formula:** Recall that $a^3 + b^3 = (a+b)(a^2 - ab + b^2)$. Here, let $a = \sin 7
Trig Identity 17077B
1. **State the problem:** Prove the trigonometric identity $$(\sin \theta + \cos \theta)(1 - \sin \theta \cos \theta) \equiv \sin^3 \theta + \cos^3 \theta.$$\n\n2. **Recall the for
Triangle Law Sines E0C4D6
1. **Stating the problem:** We are given a triangle with angle $\angle MRN = 38^\circ$ and side $MN = 4$ m. We want to find an unknown length or angle related to this triangle (lik
Equal Sides Angle 12Bed6
1. **Problem:** Find the value of $\theta$ when the perpendicular and base are the same in a right-angled triangle.
2. **Formula and Explanation:** In a right-angled triangle, the
Right Triangle Sides Ea9733
1. **Problem statement:** We have six right-angled triangles labeled (a) through (f). Each triangle has one angle (other than the right angle), one known side, and one unknown side
Triangle Bc Distance 86C4Bb
1. **Stating the problem:** We have points A, B, and C with bearings and distances given:
- Bearing of B from A is 060°.