2 2 4 6 8

x-2y=0 3x+4y=20

If A,B,C are the interior angles of a triangle ABC then show that cosec²(b+c÷2)-tan²a÷2=1

Accounts with tally

Model axulaury verb

How do I solve this problem in short form?

2tan(-1)1/5+tan(-1)1/4=tan(-1)32/43

• Prove that sum of 3 angles of triangle is180
  

In fig. 3, PQ and PR are tangents to the circle with centre O and S is a point on the
circle such that SQL  50 and SRM  60 . Find QSR.

Triangles

1. (a-b)3