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TIME RE
01:5
What is the measure of ZIKL?
J
839
K
[Not drawn to scale)
830
970
1070
1370

100 points, hi, i’m not sure how to get the equation from the graph and table.

Don't know how to find x given these segment lengths

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .