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" 1."int(sin^(2)((9 pi)/(8)+(x)/(4))-sin...

" 1."int(sin^(2)((9 pi)/(8)+(x)/(4))-sin^(2)((7 pi)/(8)+(x)/(4)))dx

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int[sin^2((9pi)/8+x/4)-sin^2((7pi)/8+x/4)]dx

int[sin^2((9pi)/8+x/4)-sin^2((7pi)/8+x/4)]dx

Prove that: sin^(4)((pi)/(8))+sin^(4)((3 pi)/(8))+sin^(4)((5 pi)/(8))+sin^(4)((7 pi)/(8))=(3)/(2)

Show that sin ^(4). (pi)/(8)+ sin ^(4) .(3pi)/(8) sin ^(4). (5pi)/(8)+sin ^(4). (7pi)/(8) =(3)/(2)

int e^(x//2) sin ((pi)/(4)+ (pi)/(2) ) dx =

int_(0)^((pi)/(2))(1)/(4cos^(2)x+9sin^(2)x)dx=

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