Q28 of 143 Page 6

sin 2A = 2 sin A is true when A =

Sin 2 A = 2 sin A


[∵ 2A = 2 sin A. Cos A]


⇒ 2 sin A . cos A = 2 sin A


⇒ cos A = 1 = cos 0°


⇒ A = 0°

More from this chapter

All 143 →
26

is equal to

 27

is equal to

 29

is equal to

 30

If A, B and C are interior angles of a triangle ABC, then =.