Trigonometry questions

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I used to be able to do these myself, but I embarassingly forgot how to.

a. Calculate ∠B

b. Calculate the length of EF in the triangle DEF

c. Calculate ∠GHJ in the square GHIJ

d. How long are the diagonals in square GHIJ

e. Calculate ∠HSI

HeyxJacq Apr 18, 2019

edited by HeyxJacq Apr 18, 2019

ElectricPavlov · Answer 1 · 2019-04-18T02:46:19

Remember SOHCAHTOA for right triangles?

a) Cos (B) = 8/17 now do th einverse cos to find B

b) Sin 20 = ?/11 Can you do it now?

c)Tan GHJ = 10/3

d) Pythagorean theorem DIagonal = sqrt (10^2 + 3^2)

e) draw line from S to bisect side 10 then 1/2 Diagonal is hypotenuse and one leg is 5 then calculate the top angle....which is 1/2 of angle HSI

See what you find!