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Trigonometry

 
Nishant Sinha
(@nishant)
Active Member

For how many values of x belongs to (-10pi, 10pi) does the equation sin^2021 (x) -sin^2 (x)=cos^2 (x) -cos^2021 (x)

Options are>  a)32   b)36   c)39   d)40

Note- I am getting 19 values but in the solution it is given that the values possible are 39 and the solution considers cos(-pi)=1 which is not true.

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Topic starter Posted : 15/06/2021 4:20 pm
Megha Dhall
(@megha)
New Member

Same query

ReplyQuote
Posted : 15/06/2021 9:11 pm
Rahul Singh
(@rahul)
Admin

ReplyQuote
Posted : 27/06/2021 12:52 am
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