Question

Fined the valeu of sineof75 .

Answer 1

Hey there

To find = Value of sin75

Sol.= >

Sin74=sin(45+30)

=Sin45Cos30+Cos45Sin30.Sin75

=(1/√2)(√3/2) + (1/√2)(1/2)

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={√3+1}/2√2. <====Answer

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Hope it helps

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Answer 2

sin 75°

=sin(30°+45°)

Now, we have to use the formula sin(A+B)

=sin A.cosB +cos A.sin B

=sin 30°.cos45° +cos30°.sin45°

= (1/2)*(1/√2)+(√3/2)*(1/√2)

Solve it

=(√3+1)/2√2 is the answer.