3 years ago

I need help proving this ASAP

2 answers:

Tom [10]3 years ago

4 0

Hey sorry I can’t help but use Mathaway or Photomath to help!

3 0

Answer:

1 + tan²A = sec²A = 1/cos²A

2tan(X/2)/(1+tan²(X/2))

= 2tan(X/2)cos²(X/2)

= 2[sin(X/2)÷cos(X/2)]cos²(X/2)

= 2sin(X/2)cos(X/2)

= sin(X)

Because sin(2A) = 2sin(A)cos(A)

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