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I urgently need help. "Simplify the expression using trig identities. Show your steps clearly, giving a reason for each step"
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I urgently need help. "Simplify the expression using trig identities. Show your steps clearly, giving a reason for each step"
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Sep 20, 2019
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I urgently need help. "Simplify the expression using trig identities. Show your steps clearly, giving a reason for each step"
Mathematics
high-school
Kumarie
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Kumarie
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sin²x / tan²x
But tanx = sinx / cosx
sin²x / tan²x = (sinx / tanx)²
sinx / tanx = sinx / (sinx/cosx)
= sinx * cosx / sinx
= cosx
Therefore: sin²x / tan²x = (sinx / tanx)² = (cosx)²
= cos²x
Hope this helps.
MathKid
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Sep 26, 2019
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