/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q. 85 In Problems 79-90, find the exac... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 7: Q. 85 (page 496)

In Problems 79-90, find the exact value of each expression.

sin2cos-145

Short Answer

Expert verified

The exact value is2425

Step by step solution

01

Given information

Given expressionsin2cos-145

02

Assume θ=cos-1(45) and calculate sine

Calculating, we get

sin胃=1-452sin胃=1-1625sin胃=925sin胃=35

03

Substitute values in double angle formula

Using double angle formula, we get

sin(2胃)=2路35路45sin(2胃)=2425

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Sawtooth Curve An oscilloscope often displays a sawtooth curve. This curve can be approximated by sinusoidal curves of varying periods and amplitudes. A first approximation to the sawtooth curve is given by

y=12sin(2蟺x)+14sin(4蟺x)

Show thaty=sin(2蟺x)cos2(蟺x)

Establish each identity.

1+cos胃+sin胃1+cos胃-sin胃=sec胃+tan胃

express each product as a sum containing only sines or only cosines

sin3蠎2cos蠎2

True or False:

tan2胃+tan2胃=tan4胃

solve each equation on the interval

3sin胃+cos胃=1
See all solutions

Recommended explanations on Math Textbooks

Statistics

Read Explanation

Mechanics Maths

Read Explanation

Pure Maths

Read Explanation

Geometry

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Calculus

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.