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Evaluate: tan105deg using the sum and difference formulas.
I
 2 years ago
 2 years ago
¿Did_You_Know? Group Title
Evaluate: tan105deg using the sum and difference formulas. I
 2 years ago
 2 years ago

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akash_809 Group TitleBest 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
 2 years ago

¿Did_You_Know? Group TitleBest ResponseYou've already chosen the best response.0
where u got 60 and 45?
 2 years ago

akash_809 Group TitleBest ResponseYou've already chosen the best response.1
tan(60+45)=tan105...right
 2 years ago

akash_809 Group TitleBest ResponseYou've already chosen the best response.1
can u do it nw
 2 years ago

akash_809 Group TitleBest ResponseYou've already chosen the best response.1
tan 60 =\[\sqrt{3}\] and tan 45 =1
 2 years ago

¿Did_You_Know? Group TitleBest ResponseYou've already chosen the best response.0
i am getting stuck at the part where it is: dw:1347964171044:dw
 2 years ago

akash_809 Group TitleBest ResponseYou've already chosen the best response.1
so \[\tan105= (1+\sqrt{3})/(1\sqrt{3}) \]
 2 years ago

akash_809 Group TitleBest ResponseYou've already chosen the best response.1
dw:1347964267571:dw
 2 years ago

akash_809 Group TitleBest ResponseYou've already chosen the best response.1
can u solve this now
 2 years ago

¿Did_You_Know? Group TitleBest ResponseYou've already chosen the best response.0
wait. why did you square that?
 2 years ago

akash_809 Group TitleBest ResponseYou've already chosen the best response.1
dw:1347965085424:dw
 2 years ago

¿Did_You_Know? Group TitleBest ResponseYou've already chosen the best response.0
arent you suppposed to mutliply it by the bottom one?
 2 years ago

akash_809 Group TitleBest 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
 2 years ago

¿Did_You_Know? Group TitleBest ResponseYou've already chosen the best response.0
so it is always the numerator?
 2 years ago

akash_809 Group TitleBest 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
 2 years ago

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

akash_809 Group TitleBest ResponseYou've already chosen the best response.1
multiply with a value that would make denominator a rational one
 2 years ago
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