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View Full Version : [(sin x cos x)/ (csc x sec x)] = (sin x cos x)


cayty3210
Dec 1, 2009, 09:10 PM
I need help verifying this problem algebraically: (sin x + cos X)/(csc x + sec x) = sin x cos x

Unknown008
Dec 1, 2009, 10:52 PM
1. Convert the cosec and sec into sin and cos. What gives:

\frac{sin\ x + cos\ x}{csc\ x + sec\ x} = \frac{sin\ x + cos\ x}{\frac{1}{sin\ x} + \frac{1}{cos\ x}}

2. Combine the fractions in the denominator, and something sill cancel out.

Can you continue now?