sin a =cos a, find the principal value of sin a. please help?

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2006-06-14 23:40:21 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help

the squareroot of 2 over 2. angle a must equal 45 degrees.
note- the answer may also appear as 1 over the squareroot of two.

2006-06-14 23:43:29 · answer #1 · answered by donlockwood36 4 · 0⤊ 0⤋

2006-06-15 06:49:23 · answer #2 · answered by dan L 1 · 0⤊ 0⤋

The angle whose sin and cosine are equal is 45 degrees and the value is .5

2006-06-15 06:45:38 · answer #3 · answered by alohachief77 2 · 0⤊ 0⤋

sina=cosa,
tan a=1
tan a=tan 45
a=n(pi)+45 where n=0,+-1,+-2............
for principal value,n=0
a=45

2006-06-15 07:26:19 · answer #4 · answered by slipknot_621 1 · 0⤊ 0⤋