Math, asked by sauveerdixit, 1 year ago

Find Φ such that 2 cos Φ • sin Φ - cos Φ = 0 if 0°<_Φ<_90°.

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Answers

Answered by siddhartharao77
3

Answer:

30°

Step-by-step explanation:

Given: 2 cos Ф * sin Ф - cos Ф = 0

⇒ 2 cos Ф * sin Ф = cos Ф

⇒ 2 sin Ф = cos Ф/cos Ф

⇒ 2 sin Ф = 1

⇒ sin Ф = 1/2

⇒ sin Ф = sin 30°

Ф = 30°.


Hope it helps!


sauveerdixit: Thanks bro. :)
siddhartharao77: welcome
Answered by Siddharta7
2

Answer:

30

Step-by-step explanation:

2 cos Ф * sin Ф - cos Ф = 0

2 cos Ф * sin Ф = cos Ф

2 sin Ф = cos Ф/cos Ф

2 sin Ф = 1

sin Ф = 1/2

sin Ф = sin 30°

Ф = 30°.

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