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webassign.net Sign In or Sign Up | Chegg.com 5.4/6.5, Inverses 8. 11 points SAlg Trig4 5.4.030 My Notes Ask Your Teacher Oo Find the exact value of the expression. cos(tan-1(Y) 9. -1 points SAlg Trig4 5.4.031 My Notes Ask Your Teacher Find the exact value of the expression. ca) 25 No Shared Links Click \"Subscriptions\" to select the social network, app, and website feeds you want to appear here Need Help? Watch It 10. 1 points SAlgTrig4 5.4.034 My Notes Ask Your Teacher Find the exact value of the expression. cor(sin-1() 11 -1 points SAigTrig4 5.4.035 My Notes Ask Your Teacher Subscriptions

Solution

cos ( tan^-1 ( 15/8 ) )

let tan^-1 ( 15/8 ) = x

tan x = 15/8

cos x = 8 / 17

therefore , cos (tan^-1 15/8) = 8/17

b) sec ( sin^-1 ( 7/25))

let sin^-1 ( 7/25) = x

sin x = 7/ 25

cos x = 24/ 25

hence, sec ( sin^-1 ( 7/25)) = 25/ 24

c) cot ( sin^-1 (8/9))

let sin^-1 (8/9) = x

sin x = 8/9

cos x = sqrt 17/9

cot x = cos x / sin x = sqrt 17 /9 / 8 / 9

= sqrt 17 / 8

therefore, cot ( sin^-1 (8/9)) = sqrt 17/ 8