trigonometry find the exact value of the expression

Calculus
Tutor: None Selected Time limit: 1 Day

0 = to data

0 = CSC^-1 (-2)

Jun 8th, 2015

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Jun 8th, 2015

but the answer on the book is -30degress

Jun 8th, 2015

yes that is also correct

since Sin 210 = sin 330  = sin (-30) = -0.5

Jun 8th, 2015

hence x = -30  is also correct


Jun 8th, 2015

I do not get the question.

Jun 8th, 2015

actually you have to find value of angle at which csc^-1(-2) 


it is true for many angles ... minimum is -30 then 210 , 330 & so on ....

Jun 8th, 2015

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Jun 8th, 2015

can you help me with this one 

tan^-1(tan 3pi/4)

Jun 8th, 2015

Answer : 3pi /4    or -Pi/4

Jun 8th, 2015

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