Question

COS (A+B) = COSA COSB-Sin AS
Sina x sinB and hence
show That cos 2A-COSTA-
sinA​

Answer 1

Answer:

hey mate here is your answer..

Step-by-step explanation:

cos(a+b)=AC−BC=AC−FD

=cos(a)cos(b)−sin(a)sin(b)

sin(a+b)=BF+FE=CA+FE

=sin(a)cos(b)+cos(a)sin(b)

Answer 2

Step-by-step explanation:

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