Questions 1 to 6 In terms of approaching the questions how should i do it Full solutions needed thank you!

Question

Questions 1 to 6. In terms of approaching the questions, how should i do it. Full solutions needed, thank you!

/2 1)a ) 0 cos 2 d /2 0 1 cos 2 2 d , use 2cos 1 cos 2
2 /2 1 sin 2 sin a ,a 0 , use cos a d a 2 2 2 0
1 1 0 sin sin 0 2 2
4 4
sin 2 1 / t 1 1
2 b) t 2 dt , put 1
1
1
1 x 2 dt dx, t x 2 and t x t…
Math