sin23°cos22°+cos25°sin22°=1/√2
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SinACosB+CosASinB = Sin(A+B)
so,
sin(23°+22°)
=sin45°
which is 1/√2
hence LHS = RHS
so,
sin(23°+22°)
=sin45°
which is 1/√2
hence LHS = RHS
gurucharan5:
Answer
firstly u see know that a²-b² =( a+b) (a-b)
apply this then sin square 75° - cos square 45° becomes
(sin75+cos45) (sin75-cos45)
then u break sin75 into sin (45 + 30)
Ohh
Thnx bro
and then apply sin(a+b) =sinacosb+cosasinb formula
I understood
ok
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