Ace school

with brainly

  • Get help from millions of students
  • Learn from experts with step-by-step explanations
  • Level-up by helping others

A community for students.

is x=15 degrees a solution of (( sqrt3)/3) cos2x+sin2x=1? how can i figure this out?

Mathematics
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Join Brainly to access

this expert answer

SEE EXPERT ANSWER

To see the expert answer you'll need to create a free account at Brainly

just substitute x = 15 into each trig ratio and use the exact angle identities below |dw:1352142650262:dw| if x =15 then 2x = 30.... use the exact values from the triangle above for cos2(15) = cos(30) ans sin2(15) = sin(30)
how did you figure the triangle? even i didnt get or understand how to do that
is the cos sqrt 3 / 2 and the sin 1/2?

Not the answer you are looking for?

Search for more explanations.

Ask your own question

Other answers:

its called the an exact value triangle and its usually taught during a topic on trigonometry. thats correct now substitute those values to show that you will get 1 as the answer,
okay let me try it. hold on
|dw:1352143377873:dw|
is this right? so it doesnt equal 1
not quite |dw:1352143232742:dw|
so it doesnt equal 1 still. right?
yes it does you need to check the 1st part |dw:1352143563524:dw|
hold on let me try again, i wrote all sloppy
|dw:1352144119351:dw|
your question says |dw:1352143923416:dw|
yes
substituting the exact values gives |dw:1352143978828:dw|
okay i see the 2x, is basically that value of cos that is the sqrt 3 /2
thats right it x = 15 2x = 30 so you are using cos(30) and sin(30) which are known as exact values.
|dw:1352144487645:dw|
no |dw:1352144327997:dw|
okay so the answer is 1/2, so the equation does not equal 1
I'll write it again |dw:1352144410590:dw|
okay, so i would cross multiply to the the 6/6 to equal 1?

Not the answer you are looking for?

Search for more explanations.

Ask your own question