Therefore since the trig equation we are solving is sin and it is positive (0.5), then we are in the 1st and 2nd quadrants. We have already found the first solution which is the acute angle from ...

Save guides, add subjects and pick up where you left off with your BBC account. Practise solving trigonometric equations in degrees or radians using CAST and its period to find other solutions ...

but the two students also outlined nine more proofs to the Pythagorean theorem using trigonometry. You may like Mathematicians devise new way to solve devilishly difficult algebra equations ...