3 years ago

1. sin(x+20) = cos(2x+10) 2. sin (2x+14) = cos(x-5)

Mathematics

1 answer:

lakkis [162]3 years ago

3 0

Answer:

x=20°

x=27°

Step-by-step explanation:

sin(x+20)=cos (2x+10)

=sin (90-(2x+10))

so x+20=90-(2x+10)

x+20+2x+10=90

3x=90-30

3x=60

x=60/3=20

2x+14+x-5=90

3x+9=90

3x=90-9=81

x=81/3=27

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