Tanx-sinx÷tanx-sinx=1-cosx ÷sinx

Given:

(sin5x−sinx)(cos4x−cos6x)

(cosx−cos3x)(sin8x+sin2x)

Use the formula:

sina+sinb=2sin(

2

a+b

)cos(

2

a−b

)

sina−sinb=2cos(

2

a+b

)sin(

2

a−b

)

cosa−cosb=−2sin(

2

a+b

)sin(

2

a−b

)

(sin5x−sinx)(cos4x−cos6x)

(cosx−cos3x)(sin8x+sin2x)

=

(2cos

2

6x

sin

2

4x

)(−2sin

2

10x

sin

2

−2x

)

(−2sin

2

4x

sin

2

−2x

)(2sin

2

10x

cos

2

6x

)

=

(2cos3xsin2x)(2sin5xsinx)

(2sin2xsinx)(2sin5xcos3x)

=1

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

1/4 because there is 4 grades.