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দৃশ্যকল্প-১ ( : f(x)= ln ( sin x), g(x)= ln ( cos x) ) দৃশ্যকল্প-২ ( A: A= left[ begin array ccc x+y+2 z &x& y z & y+z+2 x & y z & x & z+x+2 y end array right] ) | Suva Ai