Q16 of 90 Page 7

Prove that:

LHS


We know that




We know that (x + y)(x – y) = x2 – y2



Hence, proved.


More from this chapter

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16

Prove that:

sin2B = sin2A + sin2(A-B) – 2sinA cosB sin(A-B)

 16

Prove that:

cos2A + cos2B – 2 cosA cosB cos(A +B) = sin2(A +B)

 17

Prove that:

tan 8x – tan6x – tan 2x = tan 8x


tan 6x tan 2x

 17

Prove that: