Question

5) If sin 4 0 =1 , then find the value of ?​

Answer 1

From the above equation, we get

cosθ=sinθ

Hence

θ=45

0

Therefore

sin

4

θ+cos

4

θ

=sin

4

45

0

+cos

4

45

0

=2×(

2

1

)

4

=2×

4

1

=

2

1

Answer 2

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