Question

If 13 Sin A = 12 find 1/cos2A - tan2A

Answer 1

Answer:

Step-by-step explanation:

SinA=12/13

By pythagoras theorem we can find adjacent side

Where adjacent side is 5

1/cos^2 =(H/A) ^2

=(13/5)^2 =169/25

Tan^2 A=12/5

1/cos^2 - tan^2 A=169/25-12/5=109/25

Answer 2

Answer:

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