Math, asked by nayakatishay1890, 1 year ago

Evaluate: sin35. Sin55-cos35. Cos55

Answers

Answered by sandy1816

2

Step-by-step explanation:

sin35.sin55 - cos35.cos55

=sin(90-55)sin(90-35)-cos35cos55

=cos55cos35-cos35cos55

=0

or

sin35.sin55-cos35.cos55

=-(cos55.cos35-sin55.sin35)

=-cos(55+35)

=-cos90

=0

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