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Grade 11Trigonometry

Help me with the circled ones please. I have a test today. Please open the photo and check out the questions. Thanks! Please respond to me in 1 or 2 hours.

Question image for Help me with the circled ones please. I have a te

Sahil Sinha

7 Years agoGrade 11

2 Answers

Susmita

7 Years ago

ques(ii).write the given eq like

tanB+(1-n)tanBtan²A=ntanA

or,tanB-ntanA=(n-1)tanBtan²A

$Or,tanBtanA=\frac{tanB-ntanA}{(n-1)tanA}$

Now $1+tanBtanA=1+\frac{tanB-ntanA}{(n-1)tanA}=\frac{(n-1)tanA+tanB-ntanA}{(n-1)tanA}=\frac{tanA-tanB}{(1-n)tanA}$

So $tan(A-B)=\frac{tanA-tanB}{1+tanAtanB}=\frac{(tanA-tanB)(1-n)tanA}{tanA-tanB}=(1-n)tanA$

If it helps please approve.

Deepak Kumar Shringi

7 Years ago

dear student.
as per forum policy we can answer one question at a time please post one by one

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