![kataldaine](/avatars/36862.jpg)
kataldaine
28.11.2020 •
Mathematics
I need you to help me. Thanks
Solved
Show answers
More tips
- B Business and Finance How to Get Your Money Back When Lending? Top 7 Ways...
- S Sport How to Learn Swimming? Simple Tips for Beginners...
- P Photography and Videography Understanding HDR: How It Works and Why You Need It...
- G Goods and services Which TV is better - LCD or Plasma?...
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- C Computers and Internet Where did torrents.ru move to?...
- B Business and Finance Understanding Cash Flow: What It Is and How It Works...
- C Computers and Internet What Are Peers and Seeds in Torrenting?...
- H Health and Medicine 10 Simple Techniques on How to Boost Your Mood...
Answers on questions: Mathematics
- M Mathematics Which line contains point S and U...
- M Mathematics What is the answer please helppp...
- M Mathematics Continue each pattern with the next two numbers. 2.11,13,16,20,25,31,38?...
- M Mathematics What is (x+5)(x-4)=0 Expand and solve for x...
- M Mathematics Evaluate p2 - 5 when p = 14...
- M Mathematics Foil (3x-5)(x+6) need the answer ASAP...
- M Mathematics Correct 8695.496 to five significant figures...
- M Mathematics Select the correct answer. Erin gets her exercise by running. The graph shows the distances she covers in a given amount of time. How many hours does it take for...
- M Mathematics What is the solution to the equation 1/4x+2=-5/8-5...
- M Mathematics Of 50 students surveyed, 19 owned a tablet, 42 owned a calculator, and 15 owned both. How many students owned a calculator but did not own a tablet?...
Ответ:
20 is your answer
Ответ:
Step-by-step explanation:
Given sin 30° = 1/2, to check which of the statements is correct we will apply the Pythagoras theorem to a right angled triangle shown in the attachment.
using the SOH CAH TOA trig identity on the right angled triangle, ACD gotten from the equilateral triangle ABC;
From ΔACD, AD is the hypotenuse, DC is the opposite side to the angle 30° and AC is the adjacent.
From the diagram, sin30° = opp/hyp = DC/AD
sin30° = 1/2
Taking consideration of the acute angle 60°, the opposite side to the angle will be AC and the adjacent side will be CD.
According to CAH, cos 60° = adj/hyp = CD/AD
Given CD = 1 and AD = 2
cos60° = 1/2
This shows that sin30° = cos60° = 1/2
Note that ∠CDA and ∠DAC are angles complementary. Complementary angles are angles which have its sum to be 90°