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Asked by Leah

Given cosθ=3/7 and 0≤θ≤π/2 find sinθ and tanθ
9 years ago

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Answered by Damon
sin^2 T = 1 - cos^2 T
sin^2 T = 1 - 9/49

sin^2 T = 40/49
sin T = (2/7) sqrt 10

and tan T = sin T/cos T
9 years ago
Answered by Steve
or, just draw the triangle and label the sides. The missing side is √(49-9) = √40

Then you can read off all the trig functions just by looking at the sides and using the proper ones.
9 years ago

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