Establish the identity.cos(4?) = cos4 ? - 6 sin2 ? cos2 ? + sin4 ?

What will be an ideal response?

cos(4?) = cos[2(2?)] = cos2(2?) - sin2(2?) =   = cos4 ? - 6 sin2 ? cos2 ? + sin4 ?

Mathematics

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 Find all angles in [0°, 360°) that satisfy the equation.sec ? = - 

A. {45°, 315°} B. {45°, 225°} C. {135°, 225°} D. {225°, 315°}

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Mathematics

The doctor orders 2500 mL of fluid to be infused in 24 hours. The IV set is calibrated at 10 gtt/mL. Calculate the correct flow rate for this IV.

A. 10 gtt/min B. 34 gtt/min C. 17 gtt/min D. 12 gtt/min

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Mathematics

Find IT in the circuit below if IL = 9 mA, and IR = 12 mA.


a. 21 /-53.3è mA
b. 15 /-53.2è mA
c. 21 /-36.7è mA
d. 21 /57.3è mA
e. 15 /-36.9è mA

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Mathematics

Solve the inequality by using the method of your choice. State the solution set in interval notation and graph it.x2 + 2x > 1

A. (-?, -1 - ) ? (-1 + , ?)

-1 - -1 + 

B. (-?, -1 - ) ? (-1 + , ?)

-1 - -1 + 

C. (-?, ?)


D. (-?, -2 - ) ? (-2 + , ?)

-2 - -2 + 

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Mathematics