Trigonometry
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Simplify the following trigonometric expression.
(1/16)sin33.5°cos33.5°
Use a product-to-sum formula to write the given trigonometric expression as a sum or difference:
2 cos 55° sin 150°
9 cos 5x cos 8x
12sin 13x sin 17x
Write the given trigonometric sum as a product.
cos 13x + cos 16x
Write the given trigonometric difference as a product.
sin 117° - sin 83°
sin 15x - sin 7x