问题
填空题
已知角α的终边经过点P(-8m,-6cos60°),且cosα=-
|
答案
∵角α的终边经过点P(-8m,-6cos60°),
∴r=OP=
=64m2+36cos2600
,64m2+9
∵cosα=-
,∴-4 5
=4 5
,解得m=-8m 64m2+9
,1 2
故答案为:
.1 2
已知角α的终边经过点P(-8m,-6cos60°),且cosα=-
|
∵角α的终边经过点P(-8m,-6cos60°),
∴r=OP=
=64m2+36cos2600
,64m2+9
∵cosα=-
,∴-4 5
=4 5
,解得m=-8m 64m2+9
,1 2
故答案为:
.1 2