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If SIN θ= √3/2 then cos θ=____ |
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Answer» Answer: Medium Answer Given : sinθ= 2 3
Let US first draw a right △ABC,∠B=90 degrees and ∠A=θ We know that sin θ= AC BC = = 2 3
By pythagoras Theorem: AC 2 =AB 2 +BC 2
or AB 2 =AC 2 −BC 2 =4k 2 −3k 2 =k 2
AB=k FIND other T-rations using their DEFINATION: cos= AC AB = 2 1
tanθ= AB BC = 1 3
cscθ= sinθ 1 = 3
2
secθ= cosθ 1 =2 cotθ= tanθ 1 = 3
1 Step-by-step explanation: |
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