Math, asked by prajwal4, 1 year ago

if 4cosA=11sinA, find 11cosA-7sinA /11cosA+7sinA

Answers

Answered by beddalateja21

4/11 =tanA
4/137^1/2=sinA
11/137^1/2 =cosB
121/137^1/2 -28/121

prajwal4: i not understand ur answer,pls ans me clearly

Answered by maria9

Now
4cos A =11 sinS
=>cos A /sin A = 11/4
=>11 cos A/ 7 sin A =( 11 x 11)/(4 x 7)
=>11cos A/7 sin A= 121/28
=>(11cos A + 7 sin A)/(11 cos A - 7sin A)
=(121+28)/(121-28)
[componendo&dividendo]
= 149/93
therefore
11 cos A - 7 sin A/11 cos A + 7 sin A
=93/149

prajwal4: give me more problems on trigonometry, i can perfect for exam

maria9: okk

prajwal4: but pls start teaching now

maria9: I can't teach u now because I need to go to my tution

prajwal4: give questions niw

prajwal4: base on trigonometry

maria9: if 5 tan A =4

maria9: than prove :( 5sin A - 3 cos A)/(5sin A + 2cos A)=1/6

prajwal4: if 5tanA=4;sinA=4cosA/5:5(4cosA/5)-3cosA÷5(4cosA/5)+2cosA=cosA/6cosA=1/6=RHS

prajwal4: pls give more question

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