1.

Evaluate each of the following:i tan-11+cos-1-12+sin-1-12(ii) tan-1-13+tan-1-3+tan-1sin-π2(iii) tan-1tan5π6+cos-1cos13π6

Answer» Evaluate each of the following:



i tan-11+cos-1-12+sin-1-12

(ii) tan-1-13+tan-1-3+tan-1sin-π2



(iii) tan-1tan5π6+cos-1cos13π6


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