![tannersclark](/avatars/15532.jpg)
tannersclark
12.08.2020 •
Mathematics
PROVE THAT:
cos 20° - sin 20° = \sqrt{2}sin25°
Solved
Show answers
More tips
- P Philosophy Personal attitude towards Confession: how to prepare and undergo the procedure correctly?...
- H Health and Medicine Flu: How to Recognize It by the First Symptoms?...
- F Food and Cooking How to Sober Up Quickly? Important Facts and Tips...
- H Health and Medicine How to Properly Take a Blood Sugar Test?...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
Answers on questions: Mathematics
- M Mathematics Whats the answer to 3 1/2 divided by 2 1/4...
- M Mathematics Please help, i really beg...
- E English As you reread the passage, Identify how the author develops the central or main idea. Highlight specific text that adds critical new Information to the central or main idea....
- C Computers and Technology What is your fb ID??...
- S Social Studies The practice of behaving in a masculine or feminine way interactions with others that teach us certain behaviors the manner in which we express masculinity or femininity...
Ответ:
See below.
Step-by-step explanation:
First, use the co-function identity:
We can turn the second term into cosine:
Substitute:
Now, use the sum to product formulas. We will use the following:
Substitute:
Use the even-odd identity:
Therefore:
Replace the second term with the original term:
Proof complete.
Ответ: