3 What am I doing wrong Can you write out the steps so I kno

3. What am I doing wrong? Can you write out the steps so I know!?! Thank you very much for the help!

Solution

Ans of 1
=-1/4cos²2t+c

By putting values

=1/4cos²3.14/2+c

=0+c

Ans of 1
=-1/4cos²2t+c

=-1/4cos²3.14/2

=1