daniellekennedy05
27.08.2020 •
Mathematics
Solve for θ. sinθ = cos(θ+10)
a. 6°
b.66°
c.84°
d.30°
Solved
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Ответ:
d. 40°
Step-by-step explanation:
Use the Cofunction Identity: sin Ф = cos (90° - Ф)
sin Ф = cos (Ф + 10) = cos (90° - Ф)
⇒ Ф + 10 = 90 - Ф
2Ф + 10 = 90
2Ф = 80
Ф = 40
Ответ:
16
Step-by-step explanation: