Use sum-to-product identities to rewrite the expression as a product.cos 21° - cos 41°
A. 2 sin 31° cos 10°
B. -2 cos 31° cos 10°
C. -2 sin 31° sin 10°
D. 2 sin 31° sin 10°
Answer: D
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The length of one leg of a right triangle is 7 centimeters more than the length of the other leg. The length of the hypotenuse is 17 centimeters. Find the lengths of the two legs.longer leg __________ cmshorter leg __________ cm
What will be an ideal response?
Write the following in standard notation.3.854 × 10-6
A. .00003854 B. .0000003854 C. .000003854 D. -3,854,000
Provide an appropriate response.Find the special product: (x + 7)(x - 7)
A. x2 + 49 B. x2 - 49 C. x2 + 14 D. x2 - 14x + 49
Solve using the elimination method. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this. x + 2y = 10 7x + 2y = 22
A. (2, 4) B. No solution C. (3, 3) D. (-4, 2)