作业帮log4 sin(3π)/4+log9 tan[(-5π)/6]=_______.
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log4 sin(3π)/4+log9 tan[(-5π)/6]=_______.
log4 sin(3π)/4+log9 tan[(-5π)/6]=_______.
log4 sin(3π)/4+log9 tan[(-5π)/6]=_______.
log4 sin(3π)/4+log9 tan[(-5π)/6]
=log4 sin(π)/4+log9 tan[2π+(-5π)/6]
=log4 (√2/2)+log9 tan[7π/6]
=log4 (2^(1/2))+log9 √3
=log4 (4^(1/4))+log9 9^(1/4)
=1/4+1/4
=1/2
log4 sin(3π)/4+log9 tan[(-5π)/6]=_______.
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