Math, asked by sakshi7839, 9 hours ago

cos (A - B) - cos (A + B) =

Answers

Answered by Fatema2233

1

Step-by-step explanation:

plz mark me brainliest..

Attachments:

Answered by shishagirl7690

1

Answer:

cos(A-B)-cos(A+B)

=(cosAcosB+sinAsinB)-(cosAcosB-sinAsinB)

=cosAcosB+sinAainB-cosAcosB+sinAsinB

=2sinAsinB

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