Q8 of 164 Page 41

If find sin2 θ + cos2 θ.


Let the third side be p,


By Pythagoras theorem,


⇒ a2 + b2 = p2


⇒ p = √a2 + b2



Therefore, the other angles are:


sin θ =


cos θ =


Putting the values in function:


⇒ sin2 θ + cos2 θ


⇒


⇒


⇒


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