The drop down options are 1 through -9 as pictured for all the drop downs. **Transcription:****Title: Using Trigonometric Identities****Instructions:**Use the sum and double angle identities to write $\cos 3x$ in terms of $\cos x$:\[\cos 3x = \square \cos^3 x + \square \cos^2 x + \square \cos x\]---**Explanation:**The boxes ($\square$) are placeholders for coefficients that result from applying trigonometric identities. Specifically, the task requires using sum and double angle formulas to express $\cos 3x$ solely with powers of $\cos x$. Calculating each step provides insight into the relationships between trigonometric functions. **Title: Using Sum and Double Angle Identities in Trigonometry**---**Explanation:**In this exercise, we aim to express $ \cos 3x $ in terms of $ \cos x $ using sum and double angle identities. This involves recognizing patterns based on known trigonometric identities to simplify expressions.**Equation Example:**\[ \cos 3x = \_ \, \cos^3 x + \_ \, \cos^2 x + \_ \]The blanks in the equation are editable fields where students can select from a dropdown menu of numbers ranging from $-9$ to $9$.---**Additional Exercise:**Following this, students are instructed to express other trigonometric functions in terms of a given angle $ \theta $. **Tasks:**- Write the trigonometric expression as a function of $ \theta $.1. $ \cos(\theta + \_) $2. $ \cos(90^\circ - \theta) = $3. $ \cos(2\theta) = $4. $ \sin(\_) = $Students should fill in these expressions by applying their understanding of trigonometric identities.---**Study Tip:**- Recall key identities like the angle addition formulas and triple angle formulas for efficient solving.- Practice by filling the blanks with the correct numbers from the dropdown and comparing your results with established identities to ensure accuracy.

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Answered: Use the sum and double angle identities…

Math

Trigonometry

Use the sum and double angle identities to write cos 3x in terms of cos x: Cos 3x = + cos°x + + cos?x + COS X

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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