princessolua princessolua
  • 02-08-2020
  • Mathematics
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Please help with the questions on the picture, it's very urgent......Thank you✨​

Please help with the questions on the picture its very urgentThank you class=

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odebiyioluwatomisin
odebiyioluwatomisin odebiyioluwatomisin
  • 02-08-2020

Answer:

2. sinθ= cos 35°

sinθ= sin(90°-35)

θ= 55°

3. cos4θ= sin5θ

cos 4θ= cos (90-5θ)

4θ=90°-5θ

collect like terms

4θ+5θ=90°

9θ=90° (divide both sides by 9)

therefore θ=10°

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