Question

8 tan theta equals to 15 then value of cos theta is​

Answer 1

Answer:

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Step-by-step explanation:

$8 \tan\theta = 15 \\ = > \tan\theta = \frac{15}{8} = \frac{opp}{adj} \\ = > hyp \: = 17 \\ = > \cos\theta = \frac{adj}{hyp} = \frac{8}{17}$

Answer 2

Answer:

8tan∅=15

tan∅=15/8

tan²∅=(15/8)²

tan²∅=225/64

1+tan²∅=1+(225/64) [since, sec²∅-tan²∅=1

sec²∅=(225+64)/64 => sec²∅=1+tan²∅]

sec²∅=289/64

sec∅=√(289/64)

sec∅=17/8

cos∅=8/17

• cos∅=8/17 is the right answer.