given that

solve:

a)

b)

NOTE: <= (less than or equal to)

any help much appreciated!

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- March 16th 2009, 05:44 AMjvignaciosolving equations help
given that

solve:

a)

b)

NOTE: <= (less than or equal to)

any help much appreciated! - March 16th 2009, 05:56 AMADARSH
- March 16th 2009, 05:57 AMe^(i*pi)
- March 17th 2009, 12:52 AMjvignacio
- March 17th 2009, 01:05 AMADARSH
- March 17th 2009, 04:56 AMjvignacio
- March 17th 2009, 05:09 AMADARSH
When is cos(x) = 0 or when is cos(x) = -1

What are the values of x when this values are satisfied

For x= 0 This happens when x= 90degree or x = - 90 degrees

And for cos(x)= -1 this happens when x= 180degree or x= -180 degree

This is done using the property that

cos(-x) =cos(x)

ie; if the answer is 90 degree than answer is also -90 degree as this value also lies in the domain

Read this

http://en.wikipedia.org/wiki/Trigonometric_function