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4 years ago

Can you please help me with this!!!??

Mathematics

2 answers:

rosijanka [135]4 years ago

7 0

Answer:

See below.

Step-by-step explanation:

4 cos x / tan x + 15 = 0

tan x = sin x / cos x so substituting:

4 cos x / sin x / cos x + 15 = 0

4 cos^2 x / sin x + 15 = 0

4 ( 1 - sin^2 x) / sin x + 15 = 0

Multiplying through by sin x :

4 - 4 sin^2 x + 15 sin x = 0

Multiply through by -1:

4 sin^2 x - 15 sin x - 4 = 0.

Semenov [28]4 years ago

3 0

maybe it can help?

sin θ = -¼

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