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alexira [117]
3 years ago
15

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

Mathematics
1 answer:
ruslelena [56]3 years ago
4 0

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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