Question

Prove that
Sin45= cosa=sina

Answer 1

Step-by-step explanation:

In the first case:-

cos a=45

cos a =sin 45

cos a =1 (sin 45=1)

cos a =cos 45 (cos 45 also =1)

a=45

In the second case:-

sin a=sin 45

sin will be cancelled and

a=45

So (Sin 45=cosa=sina)

Hence proved.

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