Question

if cosA=4/5 than proof tan2S​

Answer 1

Answer:

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Answer 2

Answer:If cos A = 4/5, then sin A = 3/5 and tan = 3/4.

Approach 1: (cot A - sin A)/2 tan A = [(4/3) - (3/5)]/(2x3/4)

= [(20–9)/15]/(3/2)

= (11/15)*(2/3) = (22/45). Answer (1)

Approach 2: cot A - sin A/2 tan A

= (4/3) - (3/5)/(3/2)

= (4/3)- (3*2)/(5*3)

= (4/3)-(2/5)

= (20–6)/15 = (14/15). Answer (2)

You can choose (1) or (2) as the answer depending on where you want the brackets placed in your question.

Step-by-step explanation:

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