If A, B, C are angles of triangle. Prove that tan (A - B)/2 = cot (B + C/2)

Find the slope of the line which is passing through (1,2)and mid point of the line joining ( 0,-4)&(8,0)

The sum of three number in A.P is 15. if 1,4 and 19 are added to the number?, the resultant numbers arr in G.P. find the numbers

Coordinates of two fixed points A and B are (a, 0) and (-a, 0). Find coordinates of moving point P when

• PA² + PB² = 18

• PA = nPB, where n is a constant

• PA + PB = 2c

Tan45

Value of cosec 60

How do we find assumed mean?

2,6,10,14,18,22,26,30,34,38 in which add 5 terms to get 100 and a term can not be repeated? Find these terms.

Sum of the first P ,Q and R term of an ap are .a ,b and c respectively prove that  a/p (q-r) + b/q(r-p) + c/r(p-q)=0

find the equations of lines passing trough (2,3) and making an intercepts of length 3.162 between the lines 2x + y -3=0 and 2x+y-4=0. Here 3.162 is square root of 10

Why i can not save many posts

^10pr=2^9pr find r

what is trigonometry 

Derivation for 0! =1

Find the equation of the line on which the perpendicular from the origin makes an angele of 30⁰ with the x axis and which forms a triangle of area 50/3 with the coordinate axes. 

Question. No9. Of. Miscellaneous. Chapter  6 class  11

How to solve the inequalities graphically of 2x+y>6 and 3x+4y <_12

If tanx=3/4,π<x<3π/2.find the value of sinx/2,cosx/2,and tanx/2.

 special series ke questions kha hai sir jisme identities lagti hai