Asked by Tonie
Simplify the expressions
1.) Cos^2x/sin^2x + csc x sin x
2.) (Sec x +1)(sec x - 1)
1.) Cos^2x/sin^2x + csc x sin x
2.) (Sec x +1)(sec x - 1)
Answers
Answered by
Steve
cot = cos/sin
csc = 1/sin
so, cos^2/sin^2 + csc*sin
= cot^2 + 1
= csc^2
(sec+1)(sec-1) = sec^2 - 1 = tan^2
csc = 1/sin
so, cos^2/sin^2 + csc*sin
= cot^2 + 1
= csc^2
(sec+1)(sec-1) = sec^2 - 1 = tan^2
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