Question

10. If x = 2sin20 and y = 2cos 20 + 1, then find x + y.​

Answer 1

Not too difficult Bud, Just Follow These Simple Steps!

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x + y = 2(sin20 + cos 20) + 1

       =  2 * 2 * sin(90/2) * cos(-50/2)        

       =  2√2cos(25)

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Hope It helps, Stay Awesome

Answer 2

Answer:

2 sin 20 + 2 cos 20 +1

=2 sin 20 + 2 sin (90 - 70) + 2 sin 30... since (sin 30 = 1/2)

= 2 sin 20 + 2 sin 70 + 2 sin 30

= 2 sin (20 + 70 + 30)

= 2 sin 120

= 1.6