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16-02-2021
Mathematics

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If cos x= sin(20 + x)° and 0° < x < 90°, the value of xis

Respuesta :

16-02-2021

Answer:

draw a right angle triangle

Step-by-step explanation:

Let one of the angles be A

cos A = sin (90-A)

90 - x - 20 = x

2x = 70

x = 35 degrees

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