Asked by Rick
Find a if a is between 0 degrees and 180 degrees, and:
a. Sin a = cos a
b. sin^2 = 3/4
c. tan^2 = 1/3
I have no clue on where to start any help would be much appreciated.
a. Sin a = cos a
b. sin^2 = 3/4
c. tan^2 = 1/3
I have no clue on where to start any help would be much appreciated.
Answers
Answered by
Steve
sina = cosa
divide by cosa and you have
tana = 1
a = 45
sin^2 = 3/4
sina = ±√3/2
a = 60,120
tan^2 = 1/3
tana = ±1/√3
a = 30,150
Looks like you need to review your "standard" angles where the values are well known, and the various signs in the quadrants.
divide by cosa and you have
tana = 1
a = 45
sin^2 = 3/4
sina = ±√3/2
a = 60,120
tan^2 = 1/3
tana = ±1/√3
a = 30,150
Looks like you need to review your "standard" angles where the values are well known, and the various signs in the quadrants.
Answered by
Rick
yeah ive just recently learnt about the unit circle and all that other stuff but thanks
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