Questions asked by Jabrim

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• Prove the identity. #sin(pi+x)=-sinx# Have to show the statements and the rules?
  
• Prove the identity. tanx-cotx/tanx+cotx=sin^2x-cos^2x Have to show the statements and the rules?
  
• Cos(x+pi/3)+cos(x-pi/3)=cosx Have the show the statement and the rules? Thanks again
  
• Simplify using the double angle formula? #cos^2(2pi/5) - sin^2(2pi/5)#
  
• Find all other zeros of P(x)=#x^3-9x^2+28x-30#, given that 3+i is a Zero.?
  
• Boris is sitting in a movie theatre, 11 meters from the screen. The angle of elevation from his line of sight to the top of the screen is 13degrees, and the angle of depression from his line of sight to the bottom of the screen is 49degrees?
  
• Cosθ<0, sinθ<0. In which quadrant does terminal side of θ lie?
  
• Cosθ<0 and tanθ > 0 Determine the quadrant in which the terminal side of θ lies?
  
• #cotO/<0 and sinO/>0# determine the quadrant in which the terminal side of #O/# lies?
  
• Determine the quadrant in which the terminal side of #O/# lies? #cosO/ > 0, and cscO/ >0#
  
• Prove the identity? cos(x-y)sinx-sin(x-y)cosx=siny
  
• Given the right triangle below, find #cos theta#, #sin theta#, #tan theta#, #sec theta#, #csc theta#, and #cot theta#. Do not approximate, find exact answers and show all work?
  
• Solve the following problem for the angle x?
  
• Prove the identity using the following rules, Algebra, reciprocal, quotient, Pythagorean, and odd/even?
  
• Use the binomial formula to the coefficient of the #t^22p^3# term in the expression #(t+2p)^25#?
  
• The sum of three numbers is 85. The first number is 5 more than the second. The third number is 3 times the first. What are the numbers?