If cos 55° and sin 55° = 0.8 each then answer of 3 cos 125° + 5 sin 125° is
A). 0.6
B). 1.6
C). 2.3
D). 2.5
For any acute angle, cosine A is equal to
A). cos (180° - A)
B). -cos (180° - A)
C). cos (180° + A)
D). -cos (180° + A)
By expressing cos 82° in terms of trigonometrical ratios, answer will be
A). cos 29° = -0.8746
B). cos 38° = -0.7880
C). cos 89° = -0.2319
D). cos 98° = -0.1392
Flat surface like blackboard is classified as
A). plane
B). vertex plane
C). triangular plane
D). trigonometrical plane
Number of dimensions a point can have is
A). zero
B). one
C). infinite
D). negative