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Hello everyone,

Im writing this as im trying to figure out why solving finite integrals with my ti 84 plus gives me different answers as solving it with an integral calculator like https://www.integralrechner.de/#

The integrals are:
(1-cos(π*x/14))^2dx (from 0 to 7)
for which im getting 1,977*10^-7 with my TI whereas I should get 1,587
and
cos(π*x/14)^2dx (from 0 to 7)
for which im getting 7 with my TI and 3.5 with an online integral calculator

Why is this happening?
Thanks in advance

P.S. i typed the integrals in correctly, hopefully
Did you make sure you were in the correct mode (radians vs. degrees)?
you are the real MVP thanks for the fast and helpful answer
  
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