sinsquare 10 + sin 80
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Hi ,
It may be like this ,
sin² 10 + sin² 80
= sin² ( 90 - 80 ) + sin² 80
= cos² 80 + sin² 80
[ Since sin( 90 - A ) = cosA ]
= 1
[ Since cos² A + sin² A = 1 ]
I hope this helps you.
: )
It may be like this ,
sin² 10 + sin² 80
= sin² ( 90 - 80 ) + sin² 80
= cos² 80 + sin² 80
[ Since sin( 90 - A ) = cosA ]
= 1
[ Since cos² A + sin² A = 1 ]
I hope this helps you.
: )
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