Question

I'm confuse 😕 in triangle 

9th class cce

The curved surface of a cylinder is 1000 CM square A wire of diameter 5 millimetre wound round it so as   first cover computer find the length of the wire

• What is diagonal
  
• What is interior angle
• What is full form of cpct

1. If cosecO+cot0=k then prove that cos0=k²-1÷k²+1

how value will be a =2c or another number such as 5c

Theorem 1.3 not given 

Theorem 1.3 not given 

in 4 example  2 [5-2x,< x -30 ] in this equation how 2 is coming in outside 

in 4 example  2 [5-2x,< x -30 ] in this equation how 2 is coming in outside 

Math

find the point in which the joint of (-9,4,5) and (11,0,-1) is met by the prependicular from the origin.