Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Evaluate: tan105deg using the sum and difference formulas.
I
 one year ago
 one year ago
Evaluate: tan105deg using the sum and difference formulas. I
 one year ago
 one year ago

This Question is Closed

akash_809Best ResponseYou've already chosen the best response.1
tan(a+b)=(tan a +tan b)/(1tan a tan b)....put a =60 and b =45 and solve
 one year ago

¿Did_You_Know?Best ResponseYou've already chosen the best response.0
where u got 60 and 45?
 one year ago

akash_809Best ResponseYou've already chosen the best response.1
tan(60+45)=tan105...right
 one year ago

akash_809Best ResponseYou've already chosen the best response.1
tan 60 =\[\sqrt{3}\] and tan 45 =1
 one year ago

¿Did_You_Know?Best ResponseYou've already chosen the best response.0
i am getting stuck at the part where it is: dw:1347964171044:dw
 one year ago

akash_809Best ResponseYou've already chosen the best response.1
so \[\tan105= (1+\sqrt{3})/(1\sqrt{3}) \]
 one year ago

akash_809Best ResponseYou've already chosen the best response.1
dw:1347964267571:dw
 one year ago

akash_809Best ResponseYou've already chosen the best response.1
can u solve this now
 one year ago

¿Did_You_Know?Best ResponseYou've already chosen the best response.0
wait. why did you square that?
 one year ago

akash_809Best ResponseYou've already chosen the best response.1
dw:1347965085424:dw
 one year ago

¿Did_You_Know?Best ResponseYou've already chosen the best response.0
arent you suppposed to mutliply it by the bottom one?
 one year ago

akash_809Best ResponseYou've already chosen the best response.1
no it is rationalization u multiply num and den both by a coomon value so that the expression remains unaffected
 one year ago

¿Did_You_Know?Best ResponseYou've already chosen the best response.0
so it is always the numerator?
 one year ago

akash_809Best ResponseYou've already chosen the best response.1
no depends on what simplifies the root if 1root 3 was there in numerator and 1+root 3 in den the you would multiply num and den by 1root 3...since (1+root 3)(1root3)=13...using a^2b^2
 one year ago

¿Did_You_Know?Best ResponseYou've already chosen the best response.0
how would you know which one to multiply by tho?
 one year ago

akash_809Best ResponseYou've already chosen the best response.1
multiply with a value that would make denominator a rational one
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.