Asked by trig
simplify the expression.
cot^2(x)-csc^2(-x)
cot^2(x)-csc^2(-x)
Answers
Answered by
Steve
csc(-x) = -csc(x)
sin^2+cos^2 = 1
sin^2+cos^2 = 1
Answered by
tony
But my teacher gave the answer on the review as -1.
Answered by
Steve
but but but ... you should have used my hints.
csc^2(-x) = (-cscx)^2 = csc^2(x)
sin^2+cos^2 = 1
divide by sin^2 to get
1+cot^2 = csc^2
cot^2 - csc^2 = -1
sin^2+cos^2=1 will help solve many problems.
csc^2(-x) = (-cscx)^2 = csc^2(x)
sin^2+cos^2 = 1
divide by sin^2 to get
1+cot^2 = csc^2
cot^2 - csc^2 = -1
sin^2+cos^2=1 will help solve many problems.
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