AC = √ 3 because it is a non-hypotenuse side of a triangle with sides 1 and hypotenuse 2, and √ (2²-1²) = √3 by pythagoras. BC = 1 because AB = 2 and the white + red triangles together make an …

Jul 23, 2018 · How do you find the angle of the sum and difference identities to simplify sin15?

No! lol. Look at your 1st equation: sin (x) + sin (60 - x) = sin (60 + x) Rearranging ( take away sin (60 - x) from both sides) sin (x) = sin (60 +x) - sin (60 - x) which looks very similar to sin (a) = sin (84) - sin …

Sep 20, 2023 · When I done it I done: sin (60+theta) = sin (90-theta) 60+theta = 90-theta Then solved to get theta = 15 How do I do the arcsin in this case? When you go from line 1 to line 2 (bold) you take …

Explanation: Using trigonometry, if I make a right angled triangle with the length 5 as the hypotenuse and use the #60^@# to find the height of the triangle. This would be the height of the parallelogram.

May 2, 2019 · (a Calculate the value of −2 tan (−120°). (1 mark) b On the same set of axes sketch the graphs of y = 2 sin (x −60°) and y = −2 tan x, in the interval −180° ⩽ x ⩽ 180°, showing the …

Aug 12, 2025 · Unparseable LaTeX formula: y=2\sin (x-60) first and begin with the base case of having just Unparseable LaTeX formula: y=\sin x

May 23, 2019 · It's a bit late, but here it is anyway! I will add more to the markscheme when I get the time. If you want any clarification or think a mistake was made, feel free to leave a message. 1) …

Here, sin^2 (A/2)=cos^2A (1-cosA)/2=cos^2A 1-cosA=2cos^2A 2cos^2A+cosA-1=0 2cos^2A+2cosA-cosA-1=0 2cosA (cosA+1)-1 (cosA+1)=0 (cosA+1) ( (2cosA-1)=0 cosA+1=0 or 2cosA-1=0 cosA=-1 …

May 15, 2025 · PR/sin 45 = QR / sin 60 Since you have been given this question to do I would expect you to have learned about sin, cos and tan of 30, 45 and 60 degrees. If you don't know them you can …