Please, PLEASE help, I don't get it... it's not even that hard a question... only a (b) part, but I honestly don't get it and my brother started spouting something about it being a right angle that I didn't understand...
Sorry I can't put a diagram in...
So.
i) In the triangle xyz, angle xzy = 60 degrees, [yz]=8 cm and tan of angle zxy=4/5
Find the value of sin of angle zxy in surd form.
ii) Hence, calculate [xy], giving your answer in the form square root of a, where a is an element of N.
I really just blanked on this question. I HATE trig.
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