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sp2606 [1]
3 years ago
8

Trigonometry Trigonometric Functions Given: Tan θ = (7/5), Find: Cos θ

Mathematics
1 answer:
aliya0001 [1]3 years ago
5 0

Answer:

cosθ = 5sqrt(74)/74, -5sqrt(74)/74

Step-by-step explanation:

1 + tan²θ = sec²θ

1 + (7/5)² = sec²θ

1 + 49/25 = sec²θ

74/25 = sec²θ

secθ = sqrt(74)/5, -sqrt(74)/5

cosθ = 5/sqrt(74) , -5/sqrt(74)

cosθ = 5sqrt(74)/74, -5sqrt(74)/74

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Step-by-step explanation:

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