.
.The sine and cosine of 
: 
, 
.The trigonometric identities for the sine and cosine of supplementary angles: 
and 
.
isn't very well-known. However, note that: 
;
minus 
, its sine and cosine can be found from the sine and cosine of 
and 
:
.
.
. Find the exact value by using a half-angle identity.
Mathematics, 01.06.2020 11:57 julianjacobg126
Question 3 (Essay Worth 4 points)
Find the exact value by using a half-angle identity.
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Question 3 (Essay Worth 4 points)
Find the exact value by using a half-angle identity.
Find the exact value by using a half-angle identity.
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