lazoeniAbigsr lazoeniAbigsr

21-11-2016
Mathematics

Answered

determine the exact value of the trig ratios:

cos(13pi/4)

cot(11pi/2)

sec(5pi/3)

Verified Answer :

syed514 syed514

21-11-2016

This isn't the only trick you'll need, but it will help you get these expressions in terms you'll be able to handle more easily.

For example, for the cot example above:
cot(-pi/2) = cos(-pi/2)/sin(-pi/2) = 0/-1 = 0

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