- #1
Haroldingo
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Homework Statement
Ok, so this is really basic and i could do it at the snap of a finger liek a year ago but it's completely escaped me. Maths is too much.
This is a right angle triangle, with the right angle on angle C. Angles are marked A, B and C. Side CB = Adjacent, Side BA = Hyp and side CA = opposite.
A smaller triangle is sat with it's hypotenuse as side CA. It's a right angle triangle with D as the right angle, which sits on a line that travels from C to directly over A.
a) Calculate size of angle BAC.
Give your answer to 1 DP.
b) Calulate length of DA.
Give your answer to 3 sf.
Homework Equations
AB = 22cm
AC = 10cm
Angle ACB = angle ADC = Angle BAD = 90
The Attempt at a Solution
I'm stuck. It's a simple bit of knowledge I've forgotten.
Something to do with Sineθ ?
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