Math, asked by kgomotsoorna1924, 1 year ago

Evaluate
Cos230.Cos160 +Sin310.Sin200

Answers

Answered by deepanshukatariya234

2

Answer:

Step-by-step explanation:

=-(sin40*cos20 +sin40 *cos20)

=-2sin(40+60)

=-2sin60

=-2*√3/2

=-.√3

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