Questions asked by unknown

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• Prove? sin2x=2tanx/1+tan^2x
  
• Prove? sin2x-4cosxsin^3x = sin2xcos2x
  
• Prove? cotx-tanx = cos2x/sinxcosx
  
• Prove? cotx = sin5x+sin7x / cos5x-cos7x
  
• Write sec theta - tan theta sin theta in terms of sin theta and cos theta; then simplify if possible. (Leave your answer in terms of sin theta and/or cos theta)? See details for the problem
  
• Add or subtract? Simplify your answer if possible. Leave your answer in terms of sin theta and/or cos theta sin theta + 1/cos theta
  
• A sector of area 25 in^2 is formed by a central angle of 4 radians. Find the radius of the circle?
  
• A point P moves around a circle of r = 1ft at 20rpm (rotations per minute). Find the linear velocity (to the nearest feet per minute)?
  
• How to solve sin5x = -sin3x?
  
• Write the complex number in trigonometric form? using both degrees and radians 1 − i
  
• Convert all complex numbers to trigonometric form and then simplify the expression? Write the answer in standard form.
  
• Convert all complex numbers to trigonometric form and then simplify the expression. Write the answer in standard form.? #((2+2i)^5 (-3+i)^3) /(sqrt 3+i)^10#
  
• Find all x and y (0 ≤ x < 2π, 0 ≤ y < 2π) so that the following equation is true? (Enter your answers as a comma-separated list.) #cosx+isiny=sinx+i#
  
• Find all degree solutions in the interval 0° ≤ θ < 360°. If rounding is necessary, round to the nearest tenth of a degree. (Enter your answers as a comma-separated list.)? #3 sin^2 θ − 10 cos 2theta = 0#
  
• Find all solutions if 0° ≤ θ < 360°. Verify your answer graphically. (Enter your answers as a comma-separated list.)? #sin 2θ = −1/2#
  
• Find all solutions if 0° ≤ θ < 360°. Verify your answer graphically. (Enter your answers as a comma-separated list.)? #cos 3θ = 1#