Establish the identity.cos 
= -sin x
What will be an ideal response?
cos 
= cos x cos 
- sin x sin 
= (cos x)(0) - (sin x)(1) = - sin x.
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Multiply and simplify.
A. -25
B. 15
C. -15
D. 25
Convert the mass or weight as indicated. Round the answer to two decimal places if necessary.560 grams to ounces
A. 16,559.2 oz B. 18.94 oz C. 15,876 oz D. 19.75 oz
Solve the problem.An isosceles triangle contains two angles of the same measure. If the measure of the third angle is 51° less than the measure of either of the other two angles, find the measure of one of the identical angles by solving the equation 2x + (x - 51) = 180, where x represents the measure of one of the identical angles.
A. 57° B. 26° C. 115.5° D. 77°
Solve the equation and check your proposed solution.-7.6x = 22.8
A. {-0.33} B. {-19.8} C. {3} D. {-3}