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integrate sin^2 x(degrees) show all/most working out plz

yep, i dont think i typed it wong, did i?

Find the volume, to 2 decimal places, of the solid formed.... y = sec (pi) x is rotated about the x-axis from x = 0 to x = 0.15 answer is..0.51 units cubed, but how?

whew finally got it thx alot :)

ohh got it now, b4 i was trying to sub x = √(u + 4) into the x on top, thx what about... If the gradient of a curve is given by dy/dx = x / (x^2 - 1)^2 and the curve passes through (2, -1) find the equation of the curve. i just dont know how to approach this question, havent done one like this...

find... (integrate symbol) x/√(x^2 - 4) let u = x^2 - 4 answer suppose to be √(x^2 -4) + C howww x_x"

ohhh nice, thanks could someone also do it using the proper formula too pi [integrate]b/a y^2 dx its not actually b/a.. but i dunno how else to type it lol, witht hat formula, would it only work with cylinders, spheres and cones since thats where its devised from? also back to the simpsons...

=/ at least im not the only one unsure about this boundaries stuff lol thx anyway

X_X" dunno what im doing wrong but heres the question The curve y = 2^x is rotated about the x-axis between x = 1 and x = 2. Use Simpsons rule with 3 function values ..find volume... 3 significant figures the answer is 27.2 units cubed while i keep gettin 17.2 units cubed, well its getting...

just need to clear up exactly what are boundaries of a system Question: Imagine your software design and development class as a system. It contains physical components such as windows, a door, lights, the computers, tables and chairs. Students in the classroom and the teacher, this textboo igt...

2^x = x + 1 solve for x =/ any ideas? i know x = 0 x = 1 but dunno the actual working out for it