14. Trigonometric equations 1. Additional Maths OCR FSMQ

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In this video you learn how to solve questions like Sin(x)=0.3 and find the multiple solutions using the trigonometric curves. Afterwards practise the skill using exercise 8.1 from the textbook:
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Thank you so much, I need this for a test tomorrow but hadn’t been taught it properly and now I understand perfectly!!

julz_
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hi sir, I am jus wondering, as we are allowed our calculator, cant we jus find the first one (a) then assume the next figure is 180-a, the next is 360+ a and the next is 540 - a? Or is it imperative that we show workings and draw the sin curve?

fellikay