Plz answer All this question no spam. plz......
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Hey there
Refer to attachment
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anshikakesari:
thanks
and two more
I have done all
4 attachments
ok
only two are there
see to it ,there are 4
slide it
thank you
wello⭐✌
Answered by
2
Some solutions of the questions is here.
Q. 4
Solution :
sin x = cos^2x
=> sin x = 1 - sin^2x
=> sin^2x + sin x - 1 = 0
=> sin x ( sin x + 1) = 1
Answer : 1
Q. 5
Solution :
sin x + cosec x = 2
=> sin x + 1/sin x = 2
=> sin^2x + 1 - 2sin x = 0
=> sin x - 1 = 0
=> sin x = 1
So, sin^nx + cos^nx = 1 + 1 = 2
Answer : 2
Q. 7
Solution :
cos^8x + 2cos^6x + cos^4x
=> ( cos^4x + cos^2x )^2
=> [ cos^2x ( cos^2x + 1 ) ]^2
=> [ sin x ( 1 + sin x ) ]^2 = 1
Answer : 1
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