Math, asked by rebecca0205, 11 months ago

value of sin Π/8 and cosΠ/8​

Answers

Answered by Friendship11
0

sin

(

π

8

)

=

2

2

2

Explanation:

Use trig identity:

2

sin

2

a

=

1

cos

2

a

In this case,

a

=

π

8

and

2

a

=

π

4

-->

cos

π

4

=

2

2

-->

2

sin

2

(

π

8

)

=

1

2

2

=

2

2

2

sin

(

π

8

)

=

±

2

2

2

Since (pi/8) is in Q. 1, take the positive value.

sin

(

π

8

)

=

2

2

2

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