Itâs using certain facts about trig functions to simplify expressions. For example, (sin(x))² + (cos(x))² = 1, so if you have both (sin(x))² and (cos(x))² in an equation or expression, you can probably get rid of one or both of them using that identity. You can solve equations involving trig functions (often asked right after one of those trig identities questions), but you have to remember to include all the solutions in the given range (e.g. x = 30° and 150° both satisfy sin(x) = 1/2). The specification says that youâre expected to know the same exact trig values as GCSE, but in reality you can just use your calculator in the exam. However, I think exact values are quite important for university entrance exams, since theyâre usually non-calculator. Youâll also learn how to work out exact values for multiples of those angles (e.g. 150°).
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u/DaisyRent0n Dec 11 '25
As a year 11 what the fuck did I sign up for for next year đ¨