Monday

March 2, 2015

March 2, 2015

Posted by **jack** on Tuesday, June 18, 2013 at 2:42pm.

- maths -
**Steve**, Tuesday, June 18, 2013 at 3:38pmI assume you mean

cot^2 A(1 - 3 sec A + 2 sec^2 A)=1

If so, then

1 - 3 sec A + 2 sec^2 A = tan^2 A

sec^2 A - 3sec A + 2

(secA-1)(secA-2) = 0

secA=1 so A=0

secA=2 so A=π/3 or 5π/3

Looks like 5π/3 is the only solution > π/2

Check:

cot^2 5π/3 = 1/3

1 - 3 sec 5π/3 + 2 sec^2 5π/3 = 1-6+8 = 3

**Answer this Question**

**Related Questions**

math - Determine all the possible values of x where 0 deg is more than or equal ...

Math - Trigonometry - Verify the following: 1. cos x/(1-sinx)= sec x + tan x 2...

Integration - Intergrate ¡ì sec^3(x) dx could anybody please check this answer. ...

trigonometry repost - Reduce (csc^2 x - sec^2 X) to an expression containing ...

GENRAL MATHS - PROVE THAT (1+COT A+TAN A)(SIN A-COS A)=SEC A\COSEC A-COSEC A\SEC...

Algebra II - Multiple Choice (theta) means the symbol 0 with the dash in it. 1.)...

Algebra - Find the complete solution of each equation. Express your answer in ...

Algebra - Find the complete solution of each equation. Express your answer in ...

Calculus 12th grade (double check my work please) - 2- given the curve is ...

Math - Prove Trig. Identities 1. sec è (sec è - cos è)= tan^2 è 2. tan^2 è (1 + ...