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Solve the equation sin(x° − 20°) = cos(42°) for x, where 0 < x < 90.
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1 vote
Solve the equation sin(x° − 20°) = cos(42°) for x, where 0 < x < 90.

User RalfFriedl
by
8.1k points

2 Answers

3 votes

Answer:

B.) 68

Explanation:

PLATO

User Mjhasbach
by
8.5k points
4 votes
The fact that cos(x)=sin(90°−x) can help us here.

The equation can be rewritten as:

sin(x° − 20°) = sin(90° - 42°) = sin(48°)

so x-20 = 48 => x=68°
User Emartel
by
8.0k points
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