Find sin(2x), cos(2x), and tan(2x) from the given information? csc(x) = 8, tan(x) < 0
1 Answer
Feb 25, 2018
It is given that ,
Now,
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#color(red)(sin2x = 2sinxcosx#
#sin2x= 2xx1/8xx(3sqrt7)/8#
#sin2x = (3sqrt7)/32# -
#color(magenta)(cos2x = 2cos^2x-1#
#cos2x = (2xx63/64) -1#
#cos2x = (63/32) -(32/32)#
#cos2x = (31/32)# -
#color(blue)(tan2x = (sin2x)/(cos2x)#
#tan2x = (3sqrt7)/31#