Answers edited by Nityananda

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• Find the other dive trigonometric functions OF the acute angle A, given that sec A=2 ?
  
• One pump can fill a tank with oil in 4 hours. A second pump can fill the same tank in 3 hours. If both pumps are used at the same time, how long will they take to fill the tank?
  
• Question #faffa
  
• Question #f5a58
  
• How do you find the perimeter and area of a rectangle with width of `2sqrt7-2sqrt5` and length of `3sqrt7+3sqrt5`?
  
• Question #06769
  
• Question #431d8
  
• The sun casts a shadow of a pine tree on the ground. The tree is 65 feet tall. The angle of depression is 53.4°. What is the length of the shadow?
  
• The base of a triangular pyramid is a triangle with corners at `(1 ,2 )`, `(3 ,6 )`, and `(8 ,5 )`. If the pyramid has a height of `5`, what is the pyramid's volume?