Math, asked by karimullakhajasharif, 8 months ago

I want correctanswer fullanswer​

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Answered by nishtirumalaraju
0

(i)sin²15+sin²75/cos²36+cos²54

=sin²15+cos²15/sin²54+cos²54

 (since sin²A+cos²A=1)

=1/1

=1

(ii)sin5.cos85+sin85.cos5

This is in the form sin(A+B)=sinAcosB+cosAsinB

Hence

 sin5.cos85+sin85.cos5=sin(5+85)

                                       =sin90

                                       =1

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