Trig Ratios B2Bc77
1. **Problem 1:** Given a right triangle with angle $\theta$, opposite side = 9, adjacent side = 40.
2. **Find:** $\sin \theta$, $\csc \theta$, $\cos \theta$, $\sec \theta$, $\tan \theta$, $\cot \theta$.
3. **Step 1:** Calculate the hypotenuse $h$ using Pythagoras theorem:
$$h = \sqrt{9^2 + 40^2} = \sqrt{81 + 1600} = \sqrt{1681} = 41$$
4. **Step 2:** Use definitions of trig functions:
- $\sin \theta = \frac{\text{opposite}}{\text{hypotenuse}} = \frac{9}{41}$
- $\csc \theta = \frac{1}{\sin \theta} = \frac{41}{9}$
- $\cos \theta = \frac{\text{adjacent}}{\text{hypotenuse}} = \frac{40}{41}$
- $\sec \theta = \frac{1}{\cos \theta} = \frac{41}{40}$
- $\tan \theta = \frac{\text{opposite}}{\text{adjacent}} = \frac{9}{40}$
- $\cot \theta = \frac{1}{\tan \theta} = \frac{40}{9}$
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5. **Problem 2:** Given a right triangle with angle $\theta$, opposite side = 7, hypotenuse = 11.
6. **Find:** $\sin \theta$, $\csc \theta$, $\cos \theta$, $\sec \theta$, $\tan \theta$, $\cot \theta$.
7. **Step 1:** Calculate the adjacent side $a$ using Pythagoras theorem:
$$a = \sqrt{11^2 - 7^2} = \sqrt{121 - 49} = \sqrt{72} = 6\sqrt{2}$$
8. **Step 2:** Use definitions of trig functions:
- $\sin \theta = \frac{7}{11}$
- $\csc \theta = \frac{11}{7}$
- $\cos \theta = \frac{6\sqrt{2}}{11}$
- $\sec \theta = \frac{11}{6\sqrt{2}}$
- $\tan \theta = \frac{7}{6\sqrt{2}}$
- $\cot \theta = \frac{6\sqrt{2}}{7}$
**Summary:**
Problem 1:
$\sin \theta = \frac{9}{41}$, $\csc \theta = \frac{41}{9}$, $\cos \theta = \frac{40}{41}$, $\sec \theta = \frac{41}{40}$, $\tan \theta = \frac{9}{40}$, $\cot \theta = \frac{40}{9}$
Problem 2:
$\sin \theta = \frac{7}{11}$, $\csc \theta = \frac{11}{7}$, $\cos \theta = \frac{6\sqrt{2}}{11}$, $\sec \theta = \frac{11}{6\sqrt{2}}$, $\tan \theta = \frac{7}{6\sqrt{2}}$, $\cot \theta = \frac{6\sqrt{2}}{7}$