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Evgen [1.6K]
3 years ago
7

If sin 21 = cos (5x+9) what is the value of x

Mathematics
1 answer:
n200080 [17]3 years ago
4 0

sin x = cos 54 = sin (90-54) = sin 46

Hence x = 46 deg

Same technique. Sin 21 = cos (5x+9) = sin (90-5x-9)

81-5x = 21

Or 5x = 60

Or x = 12 deg

hope it helps

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If x=-3, then the solution of the equation 2x+6 is ?
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6 0
3 years ago
-5/12-(-9/3) Reduce to simplest form
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Answer:

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The equivalent equation is

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The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.

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3 0
3 years ago
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igor_vitrenko [27]

Answer:

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= 225

GH= √225

=15

4 0
2 years ago
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