Q12 of 90 Page 7

Prove that:

We know that sin(A +B) = sinA cosB + cosA sinB





= sin 90°


= 1 = RHS


Hence proved.


More from this chapter

All 90 →
12

Prove that:

 12

Prove that:

 13

Prove that:

14

If tanA = 5/6 And tanB = 1/11, prove thatA +B = π/4.