Ask your own question, for FREE!
Mathematics 13 Online
OpenStudy (anonymous):

@ganeshie8 Trigonometry Help (for those who helped before, these are different types of problems) Problem to be posted in image form.

OpenStudy (anonymous):

OpenStudy (anonymous):

i know \[\sin2\theta\] becomes \[2\sin \theta \cos \theta \] but im not entirely sure where to go from here.

ganeshie8 (ganeshie8):

what exactly are you stuck at..

OpenStudy (anonymous):

well i dont really know lol, i just dont know what to do at all

ganeshie8 (ganeshie8):

\[\large \sin 2\theta = 2\sin \theta \cos \theta \] \[\large = 2\sin \theta \sqrt{1-\sin^2 \theta }\]

ganeshie8 (ganeshie8):

plugin the given \(\sin \theta\) value and simplify

OpenStudy (anonymous):

so i came out with the wrong answer and after entering it wrong, it actually tells me to use the Pythagorean Identities to solve

ganeshie8 (ganeshie8):

yes what did u get as answer ?

OpenStudy (anonymous):

0.4770

ganeshie8 (ganeshie8):

im getting 0.7225 http://www.wolframalpha.com/input/?i=2*0.3928sqrt%281-0.3928%5E2%29

OpenStudy (anonymous):

hm yours is right, ill work it again and see if i can come out with that

ganeshie8 (ganeshie8):

ok

OpenStudy (anonymous):

ahh got it!

OpenStudy (anonymous):

i did it totally wrong the first time

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!