f:R→, g:R→, h:R→R, fx=tan-1x, gy=siny এবং f:R→, g:R→, h:R→R, fx=tan-1x, gy=siny হলে gfohtan300 এর মান-

A 300
B 450
C 1-322
D 3-122

Correct Answer: 3-122

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