**Instruction:**Find the cosine of ∠C.**Triangle Diagram Explanation:**- The triangle is a right-angled triangle.- The vertices are labeled as D, B, and C.- The side BC (adjacent to ∠C) is labeled with the length 3.- The side BD (opposite to ∠C) is labeled with the length √57.- The hypotenuse DC is labeled with the length √66.- The right angle is at vertex B.**Task:**Write your answer in simplified, rationalized form. Do not round.**Cosine Formula:**\[ \cos(C) = \frac{\text{Adjacent}}{\text{Hypotenuse}} \]**Input Field:**\[ \cos(C) = \Box \]**Buttons:**- A fraction button- A square root button**Action Button:**- Submit**Help Options:**- “Work it out”- “Not feeling ready yet? These can help:”

Answered: Image /qna-images/answer/e52498f0-fbce-4b84-88bb-faae02e9db39.jpg

IXL-Trigonometric ratios: sin, cos, and X ixl.com/math/level-l/trigonometric-ratios-sin-cos-and-tan Google Home Page C Home - Canva 57 Find the cosine of ZC. B D + = 3 Submit Card & Billing Accounts √66 C AA Tools School Apps Write your answer in simplified, rationalized form. Do not round. cos (C)= Health Apps YouTube Work it out Not feeling ready yet? These can help:

IXL-Trigonometric ratios: sin, cos, and X ixl.com/math/level-l/trigonometric-ratios-sin-cos-and-tan Google Home Page C Home - Canva 57 Find the cosine of ZC. B D + = 3 Submit Card & Billing Accounts √66 C AA Tools School Apps Write your answer in simplified, rationalized form. Do not round. cos (C)= Health Apps YouTube Work it out Not feeling ready yet? These can help:

Trigonometry (11th Edition)

11th Edition

ISBN:9780134217437

Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels

Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels

Chapter1: Trigonometric Functions

Section: Chapter Questions

Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.

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Question

100%

**Instruction:**

Find the cosine of ∠C.

**Triangle Diagram Explanation:**

- The triangle is a right-angled triangle.
- The vertices are labeled as D, B, and C.
- The side BC (adjacent to ∠C) is labeled with the length 3.
- The side BD (opposite to ∠C) is labeled with the length √57.
- The hypotenuse DC is labeled with the length √66.
- The right angle is at vertex B.

**Task:**

Write your answer in simplified, rationalized form. Do not round.

**Cosine Formula:**

\[ \cos(C) = \frac{\text{Adjacent}}{\text{Hypotenuse}} \]

**Input Field:**

\[ \cos(C) = \Box \]

**Buttons:**

- A fraction button
- A square root button

**Action Button:**

- Submit

**Help Options:**

- “Work it out”
- “Not feeling ready yet? These can help:”

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