Question

@ParthKohli
3 cos A = 4 sin A
find
cos A
3 - cot^2 A + cosec^2 A

Answer 1

@Directrix

Answer 2

Is this question two problems or one?

I get that these go together: 3 cos A = 4 sin A find cos A

But, what is this: 3 - cot^2 A + cosec^2 A @AaronAndyson

Answer 3

First 3 cos A = 4 sin A find cos A then 3 - cot^2 A + cosec^2 A

Answer 4

@Directrix

Answer 5

3 cos A = 4 sin A
find
1. cos A
2.3 - cot^2 A + cosec^2 A

Answer 6

@Directrix
@satellite73
@ParthKohli

Answer 7

@Directrix

Answer 8

@AaronAndyson 1.cosA=?
given that,
3cosA=4sinA
=> sinA/cosA=3/4
=> tanA=3/4
=>tan^2 A=9/16
=> sec^2 A -1 =9/16
=> sec^2 A = 9/16 + 1
=> sec^2 A = (9+16)/16
=> sec^2 A = 25/16
=> sec A = 5/4 [taking squ. root in both sides]
=>1/cosA = 5/4 [since secA=1/cosA]
=> cosA = 4/5