52MATHEMATICSProve that-cos-1 (1-ど). x E [0, l스're10. cot2VI ± si – InterviewSolution

1.	52MATHEMATICSProve that-cos-1 (1-ど). x E [0, l스're10. cot2VI ± sin x-VI-sinx)-_cos12.---sin-1-=-sinSolve the following equations:13. 2tam" (cos x) = tan-1 (2 cosec x)15. sin (tan'x), lxl< I is equal to
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