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If sin alpha =0.2 and cos beta=0.2. Find sin( alpha + beta)

Posted by Account Deleted 4 years, 8 months ago

CBSE > Class 10 > Mathematics

1 answers

Pratham Rathod 4 years, 8 months ago

Here, Sin α = cos β = 0.2 •°• sinα = cos β Now, according to complementary angle ratios... Cosβ = sin(90-β) so by applying this concept... Sinα = sin(90-β) •°• α = 90-β •°• α+β=90 ----(1) We have to find Sin(α+β) so now according to (1).... Sin(α+β) = Sin(90) and the value of Sin90 = [1]//

2Thank You

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