Question

No. 46 Please.


Answer with explanation.

Answer 1

Ah ! Author's so over confident =_=

✓✓ Put x = 45 to Verify such stupid Questions or any desirable values

✓✓ Next step ^^" Let's correct the question to something that adjusts perfectly :flushed:

# Now, to prove this is really trivial ^^" Not the essay type at

$( \sin x + \cos x) {}^{2} = (1 + 2t)$

$( \sin x + \cos x) {}^{4} = (1 + 2t) {}^{2}$

$\sin {}^{6} x + \cos {}^{6} x = (1 - 3t {}^{2} )$

$where \: \: \sin x \cos x = t$

Replace, expand, and you get the result... ( Make sure you correct the question )

And hey =_= No need to replace the t's back to sin or cos as they cancel finally ! Just replace the question with the above given expansion in terms of "t" and get your answer :smile:

Answer 2

Hey mate,

Ah ! Author's so over confident

✓✓ Put x = 45 to Verify Questions or any desirable values

✓✓ Next step ^^" Let's correct the question to something that adjusts perfectly

Replace, expand, and you get the result... ( Make sure you correct the question )

And hey =_= No need to replace the t's back to sin or cos as they cancel finally ! Just replace the question with the above given expansion in terms of "t" and get your answer :smile: