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Monday, April 15, 2013

Proving Trigonometric Identities, 5

Category: Trigonometry

"Published in Newark, California, USA"

Prove that 


Consider the give equation above

Use the left side of the equation to prove the trigonometric identities because it is more complicated part, as follows

Use the sum and product formula, we have

Multiply the numerator and the denominator by sin x, we have


Therefore the above equation becomes