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PIT_PIT [208]
4 years ago
9

Sin x = cos (3x + 20)

Mathematics
1 answer:
Alenkasestr [34]4 years ago
3 0

Answer:

x=17.5^o

Step-by-step explanation:

<u><em>The question is </em></u>

Find the value of x

we know that

If  sin(A)=cos(B)

then

angle A and angle B are complementary angles

so

A+B=90^o

In this problem

sin(x)=cos(3x+20)

so

x^o+(3x+20)^o=90^o

solve for

4x+20=90

4x=90-20

4x=70

x=17.5^o

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