Posted by Kristien on Saturday, February 23, 2013 at 7:43pm.
Sin4A - cos4A = sin2A - cos2A
Can i just square root the left side??:O
- Trig identities:( - bobpursley, Saturday, February 23, 2013 at 7:52pm
I don't think it is an identity.
let A=90 deg
The sides are not equal.
- Trig identities:( - Kristien, Saturday, February 23, 2013 at 8:17pm
?? Im sorry i dont understand what u did but im sure tht this is an identity we have to prove tht the left side equals the right side:)
Answer this Question
More Related Questions
- trigonometry - 1/sin2A+cos4A/sin4A
- Trig - How do you express sin4x as a trigonometric funcition of x using the ...
- math/algebra - I have a triangle one side = 3 side 2 = square root5 - square ...
- trig - CosA x cos2A + ((sin2A)^2)/2cosA
- MathS triG - 1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate ...
- maths Pls help trig - 1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),...
- trig maths - rewrite 7 sin2A – 5 sin A + cos2A = o to solve for A
- further Mathematics - Let A=(cosA -sinA) (sinA cosA) show that A^2=(cos2A sin2A...
- trig - Given that cos A = 5/13 and A and B are both acute angles, calculate the ...
- trig - Prove: 1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA