Math, asked by rithukuttysuresh, 1 month ago

Simplify cos3 [ 3 3 + Sin3 [ 3 −3
−3 3] 3 3]

Answers

Answered by satyadevsms33

1

Answer:

cos(A+B)=cosAcosB−sinAsinB

cos3π=21,sinπ/3=23

⇒5cosθ+3[cos3πcosθ−sin3πsinθ]+3

⇒5cosθ+3[2cosθ−23sinθ]+3

⇒5cosθ+23cosθ−233sinθ+3

⇒213cosθ−233sinθ+3

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