plz tell fast
if sin+sin^2=1 find the value of cos^3+cos^4
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I'M NOT SURE ABOUT The ANSWER:
sin A= 1/2
sin ^2 + cos^2 = 1sin
2
+cos
2
=1
sin^2A + cos^2A=1
cos^2A= 1-sin^2A
cos^2A = 1-(1/2)^
cos^2A = 1- 1/4
cos^2A = 3/4
cos A = Root3 /2
Now
3cosA - 4Cos ^3A
3*root3/2-4(root3/2)^3
3root3/2- 4*3root3/8
3root3/2-3root3/2
0(Ans)
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