3 years ago

4. Which trigonometric expression is equal to cos 72°? A. cos 55° B. cos 50° C. sin 61° D. sin 18°

1 answer:

Yanka [14]3 years ago

8 0

Answer:

D. sin 18°

Step-by-step explanation:

sin 18 because 18 + 72 = 90

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4. Which trigonometric expression is equal to cos 72°? A. cos 55° B. cos 50° C. sin 61° D. sin 18°​