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Can anyone help me on this task sin75°.cos75°=​
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Can anyone help me on this task sin75°.cos75°=​

User KindaTechy
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2 Answers

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The answer is attached.

Can anyone help me on this task sin75°.cos75°=​-example-1
User Matthew Plourde
by
5.5k points
4 votes

Answer:0.25

Explanation:

Sin75.cos75

From trigonometric identity we know that: sin2x=2sinxcosx

sinxcosx=(sin2x) ➗ 2

Sin75cos75=(sin(2x75)) ➗ 2

Sin75cos75=(sin150) ➗ 2 but sin150=0.5

Sin75cos75=0.5 ➗ 2

sin75cos75=0.25

User Rcpinto
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