Write the expression as the
sine or cosine of an angle.
cos 7y cos 3y sin 7y sin 3y
[?][ ]y)
.
Hint: sin(A + B) = sin A cos B = cos A sin B
cos(A B) = cos A cos B i sin A sin B

"Trigonometric Identities are the equalities that involve trigonometry functions and holds true for all the values of variables given in the equation. There are various distinct trigonometric identities involving the side length as well as the angle of a triangle."

Given, trigonometric function is: cos(7y) cos (3y) - sin (7y) sin (3y)

We know, cos(A + B) = cos(A) cos(B) - sin(A) sin(B)

Therefore, cos(7y) cos (3y) - sin (7y) sin (3y)

= cos(7y + 3y)

= cos(10y)

Learn more about trigonometric identities here: https://brainly.com/question/25308510

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Write the expression as the sine or cosine of an angle. cos 7y cos 3y sin 7y sin 3y [?][ ]y) . Hint: sin(A + B) = sin A cos B = cos A sin B cos(A B) = cos A cos B i sin A sin B

Respuesta :

What are the trigonometric identities?

Otras preguntas

Write the expression as the
sine or cosine of an angle.
cos 7y cos 3y sin 7y sin 3y
[?][ ]y)
.
Hint: sin(A + B) = sin A cos B = cos A sin B
cos(A B) = cos A cos B i sin A sin B