Hi. Got a maths trig question. For a angle of less than 90 degrees, sinx=3cosx. Show and decide the value of sin2x. I just cant bring myself to figure this one out. Helps or pointers would be very appreciated
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Originally Posted by Burger king Hi. Got a maths trig question. For a angle of less than 90 degrees, sinx=3cosx. Show and decide the value of sin2x. I just cant bring myself to figure this one out. Helps or pointers would be very appreciated since ...
Hello, Burger king! I can't imagine what "show and decide" means. For an angle Show and decide the value of We have: . Hence: . So is an angle in a right triangle with: . . Pythagorus says: . Hence: . Therefore: .
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