Q17 (i) cos^-1 (

sinx + cosx / √2

)
(ii) cos^-1 (

3 cosx - 4 sinx / 5

)
(iii) sin^-1 (

x + √1- x² / √2

)
(iv) cos^-1 (

3x + 4√1-x² / 5

)

Solution

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