Question

If a=b=45°then verify sin(a+b)=sina.cos b?​

Answer 1

Answer:

See below

Step-by-step explanation:

sin(a+b) = sin 90 = 1

sin a = sin 45 = 1/√2

cos b = cos 45 = 1/√2

Hence sin a / cos b = (1/√2)/(1/√2) = 1

(Assuming dot is divide symbol)