beanzsupremacy beanzsupremacy

21-05-2021
Mathematics

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I just need question number 1, asap though, please! I need it by 12pm est

I just need question number 1 asap though please I need it by 12pm est class=

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gkgriffis gkgriffis

21-05-2021

Answer: tanA=3/4

Step-by-step explanation: If cosA=4/5 then

sinA=√(1−cos2A) {Because sin^2A+cos^2A=1}

=>sinA=√(1−16/25)

=>sinA=√(9/25)

=>sinA=3/5

Now as tanA=sinA/cosA

=>tanA=3/5×5/4 {Because 1/cosA=5/4}

=>tanA=3/4

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