Answer:
1/4
Step-by-step explanation:
3+9=12
12/3=4
This follows directly from the double angle identity for cosine and the Pythagorean identity:

So we have

Answer:
Step-by-step explanation:
(-32)^3/5 =((-32)^1/5)^3 = (-2)^3 = -8. QED
Answer: D
Tracing
Step-by-step explanation:
Sir Arthur Conan Doyle, author of the Sherlock Holmes stories, was credited as an influence to forensic science due to his character's use of methods such as fingerprints, serology, ciphers, trace evidence, and footprints long before they were commonly used by actual British and American police forces.
Answer:
360 = x+123+ 90
x = 147
Step-by-step explanation:
The three angles form a circle which is 360 degrees
360 = x+123+ 90
Subtract 123 and 90 from each side
360 -123 - 90 = x
147 = x