Question

No SPAM PLS ANSWER IF YOU KNOW

i forgot to attatch this in my previous question... ​

Answer 1

$\int _{ \frac{\pi}{2} } ^{0} \frac{1 + \cos(2t) }{2} \: dt \\ \frac{1}{2} \int _{ \frac{\pi}{2} } ^{0} \{1 + \cos(2t) \}\: dt \\ \frac{1}{2} \{ \int _{ \frac{\pi}{2} } ^{0} dt + \int _{ \frac{\pi}{2} } ^{0} \cos(2t) dt\} \\ \frac{1}{2} \{ \: t | ^{0} _{ \frac{\pi}{2} } + \frac{ \sin(2t) }{2} | {}^{0} _{ \frac{\pi}{2} } \} \\ \frac{1}{2} \{ \: 0 - \frac{\pi}{2} + \frac{ \sin(0) }{2} - \frac{ \sin( \frac{\pi}{2} ) }{2} \} \\ \frac{1}{4} \{ - \pi - 1) \\ = \frac{ - (\pi + 1)}{4}$

Answer 2

Explanation:

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