1.

​Find the principal values of each of the following:(i) cos-1-32(ii) cos-1-12(iii) cos-1sin4π3(iv) cos-1tan3π4

Answer» ​Find the principal values of each of the following:



(i) cos-1-32

(ii) cos-1-12

(iii) cos-1sin4π3



(iv) cos-1tan3π4


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