Answer:
6.3 to the nearest 10th
Step-by-step explanation:
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Please hurry!! I will mark brainliest! A student wrote four statements during math class. Which statement contains an error?
1 answer:
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Answer: Ф = 20
Step-by-step explanation:
sin2Ф = cos (Ф+ 30 )
if sinα = cosβ , then α and β are complementary ,that is they add up to be .
Therefore : 2Ф + Ф + 30 = 90
3Ф + 30 = 90
3Ф = 90 - 30
3Ф = 60
Ф = 20