/*! 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. 25 Find the exact value of the expr... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 8: Q. 25 (page 516)

Find the exact value of the expression-

tan20掳-cos70掳cos20掳

Short Answer

Expert verified

The required value is,

tan20掳-cos70掳cos20掳=0

Step by step solution

01

Step 1. Given information

Given expression,

tan20掳-cos70掳cos20掳

02

Step 2. Calculation

Solving the given expression,

tan20掳-cos70掳cos20掳=sin20掳cos20掳-cos70掳cos20掳 ----------tan胃=sin胃cos胃

=sin20掳-cos70掳cos20掳=sin(90掳-70)-cos70掳cos20掳=cos70掳-cos70掳cos20掳=0 -----------sin90掳-胃=cos胃

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

Find the exact value of six trigonometrical functions of the angle胃

Mollweide鈥檚 Formula For any triangle, Mollweide鈥檚 Formula (named after Karl Mollweide, 1774鈥�1825) states that a+bc=cos12A-Bsin12C

Derive it.

[Hint: Use the Law of Sines and then a Sum-to-Product Formula. Notice that this formula involves all six parts of a triangle. As a result, it is sometimes used to check the solution of a triangle.]

If three sides of a triangle are given, the Law of _________ is used to solve the triangle.

If the distance d of an object from its rest

position at time t is given by a sinusoidal graph, the motion of the object is simple harmonic motion.

Mollweide鈥檚 Formula Another form of Mollweide鈥檚 Formula is a-bc=sin12A-Bcos12C

Derive it.
See all solutions

Recommended explanations on Math Textbooks

Probability and Statistics

Read Explanation

Discrete Mathematics

Read Explanation

Decision Maths

Read Explanation

Mechanics Maths

Read Explanation

Logic and Functions

Read Explanation

Applied Mathematics

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.