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Question

In each of the following, one of the six stigonometric ratios is given. Find the values of the other trigonometric ratios.

(i) sin A=23

(ii) cos A=45

(iii) tan θ=11

(iv) sin θ=1115

(v) tan α=512

(vi) sin θ=32

(vii) cos θ=725

(viii) tan θ=815

(ix) cot θ=125

(x) sec θ=135

(xi) cosec θ=10

(xii) cos θ=1215

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Solution

(i) cos A=53,tan A=25,sec A=35,cosec A=32,cot A52
(ii) sin A=35,tan A=34,sec A=54,cosec A=53,cot A=43
(iii) sin θ=11122,cosθ=1122,cosecθ=12211,secθ=122,cotθ=111

(iv) cos θ=22615,tan θ=11226,sec A=15226,cotθ=22611,cosecθ=1511
(v) sin α=513,cos α=1213,cot α=125,cosec α=135,secα=1312

(vi) cos θ=12,tan θ=3, sec θ=2, cosec θ=23, cot θ=13
(vii) sin θ=2425, tan θ=247,sec θ=257, cosec θ=2524, cot θ=724
(viii) sin θ=817, cos θ=1517, cot θ=158, cosec θ=178, sec θ=1715
(ix) tan θ=512, sin θ=513, cos θ=1213, cosec θ=135,sec θ=1312
(x) sin θ=1213, cos θ=513. tan θ=125, cosec θ=1312, cot θ=512
(xi) sin θ=110, cos θ=310, tan θ=13, sec θ=103, cot θ=3
(xii) sin θ=915, tan θ=912, cosec θ=159, cot θ=129, sec θ=1512


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