Convert the subtraction into multiplication
Cos 35-Cos 15
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-2sin25sin10 is the required answer of this...
Chinthan10:
answer is -2sin24.sin11
my question wz wrong
u r correct
can u tell me the steps
Answered by
0
cosA-cosB=
-2sin(A+B/2).sin(A-B/2)
cos35-cos15
=-2sin(35+15/2).sin(35-15/2)
=-2sin25.sin10
-2sin(A+B/2).sin(A-B/2)
cos35-cos15
=-2sin(35+15/2).sin(35-15/2)
=-2sin25.sin10
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