Q10 of 48 Page 84

Prove the following with the help of identities:

Taking L.H.S we get,



Using the identity: (a2 – b2) = (a – b)(a + b)


⇒


⇒ sin2 θ + cos2 θ (since, sin2θ + cos2θ = 1)


= 1 = R.H.S


Hence, proved.


More from this chapter

All 48 →
8

Prove the following with the help of identities:

 9

Prove the following with the help of identities:

 11

Prove the following with the help of identities:

 12

Prove the following with the help of identities:

cos4θ + sin4θ = 1 – 2 cos2θ sin2θ