English, asked by akashharshavardana, 1 year ago

Sin(270-a).cos(180-a)

Answers

Answered by kethze0811

0

Answer:

Sin (270+A) =-cos A cos (180+A)= -cosA

sin (270-A) =-cos A

therefore left hand side,

sin (270+A) +cosA + cos (180+A) - sin(270-A)

= -cosA + cosA - cosA + cosA

= 0

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