Question

Sin35. Cos55 + cos35. Sin55
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Cosec ²10- tan²80

Answer 1

NOT DEFINED 1/0............

Answer 2

=sin(90-55).cos55 + cos(90-55).sin55/cosec sq (90-80)-tan sq 80
=cos55 cos55+sin55 sin55/1
=Cos sq 55 +sin sq 55
=1