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given the value of one trigonometric function of an acute angle $\\thet…

Question

given the value of one trigonometric function of an acute angle $\theta$, find the values of the remaining five trigonometric functions of $\theta$.

  1. $\sin\theta=\frac{2}{\sqrt{13}}$

$\cos\theta =$
$\tan\theta =$
$\csc\theta =$
$\sec\theta =$
$\cot\theta =$

Explanation:

Step1: Find $\cos\theta$ using $\sin^{2}\theta+\cos^{2}\theta = 1$

Given $\sin\theta=\frac{2}{\sqrt{13}}$, then $\sin^{2}\theta=\frac{4}{13}$.
Substitute into the identity: $\frac{4}{13}+\cos^{2}\theta = 1$.
So, $\cos^{2}\theta=1 - \frac{4}{13}=\frac{13 - 4}{13}=\frac{9}{13}$.
Since $\theta$ is acute, $\cos\theta=\frac{3}{\sqrt{13}}$.

Step2: Find $\tan\theta$ using $\tan\theta=\frac{\sin\theta}{\cos\theta}$

$\tan\theta=\frac{\frac{2}{\sqrt{13}}}{\frac{3}{\sqrt{13}}}=\frac{2}{3}$.

Step3: Find $\csc\theta$ using $\csc\theta=\frac{1}{\sin\theta}$

$\csc\theta=\frac{\sqrt{13}}{2}$.

Step4: Find $\sec\theta$ using $\sec\theta=\frac{1}{\cos\theta}$

$\sec\theta=\frac{\sqrt{13}}{3}$.

Step5: Find $\cot\theta$ using $\cot\theta=\frac{1}{\tan\theta}$

$\cot\theta=\frac{3}{2}$.

Answer:

$\cos\theta=\frac{3}{\sqrt{13}}$, $\tan\theta=\frac{2}{3}$, $\csc\theta=\frac{\sqrt{13}}{2}$, $\sec\theta=\frac{\sqrt{13}}{3}$, $\cot\theta=\frac{3}{2}$