Answer:
sin2A = sin(A + A) = sinAcosA + cosAsinA = 2sinAcosA = 2tanAcos²A = 2tanA/sec²A = 2tanA/1+tan²A
if you pay attention to each step you will get it
if not then tell me
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Answer:
sin2A = sin(A + A) = sinAcosA + cosAsinA = 2sinAcosA = 2tanAcos²A = 2tanA/sec²A = 2tanA/1+tan²A
if you pay attention to each step you will get it
if not then tell me