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How do i write cos 15° in terms of sine?

Guest Mar 5, 2015

Best Answer 

 #1
avatar+94110 
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the co in cosine stands for complementary.

complementary angles add to 90 degrees.

so

$$cos15=sin(90-15)$$

Melody  Mar 5, 2015
 #1
avatar+94110 
+5
Best Answer

the co in cosine stands for complementary.

complementary angles add to 90 degrees.

so

$$cos15=sin(90-15)$$

Melody  Mar 5, 2015

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