SOLUTION: (1+sin a)(1-sin a)=cos^2a
Algebra.Com
Question 416004: (1+sin a)(1-sin a)=cos^2a
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
(1+sina)(1-sina)=cos^2a............on the left side is difference of
squares
..use that
1-sin^2a=cos^2a
cos^2a=cos^2a
RELATED QUESTIONS
Cos 2A + 1/Cot A = Sin... (answered by Alan3354)
cos 2A upon 1 minus sin 2A = cot (45 -... (answered by Alan3354)
If sin(A)=-5/13. Find:
1. cos(2A)
2. sin(2A)
2.... (answered by Alan3354)
prove sin(5A) + sin(2A) - sin(A) = sin2A(2cos3A +... (answered by Alan3354)
simplify the given expressions:
a)2 sin^2α − 1/sina + cosa
b) cos^2a -... (answered by greenestamps)
simplify the given expressions:
a) (2 sin^2α − 1)/(sina + cosa)
b) (cos^2a -... (answered by MathLover1)
A is a reflexive angle whose sin is -5/13. Find:
1. sin (2A)
2. cos (2A)
3. sin (4A
(answered by Alan3354)
1/1+cos a + 1/sin... (answered by Alan3354)
csc A cos A / sec A sin A = (csc^2A-1)
(answered by Alan3354)