Login
Login
Register
Questions
Unanswered
Tags
Categories
Ask a Question
Ask a Question
[(sin 20°, -cos 20°),(sin 70°, cos 70°)] = ? (a) 1 (b) -1 (c) 0 (d) 2
+1
vote
asked
Dec 20, 2018
in
Class 12
by
kratos
[(sin 20°, -cos 20°),(sin 70°, cos 70°)] = ?
(a) 1
(b) -1
(c) 0
(d) 2
trigonometry
class-8
determinants
class-10
trigonometric ratios
class-12
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
+6
votes
answered
Jul 14, 2020
by
kratos
Best answer
Answer is (d) 2
Please
log in
or
register
to add a comment.
Related questions
Out of the following which compound has zero dipole moment? (a) CH3Cl (b) CHCl3 (c) CCl4 (d) CHI3
Chlorophyll contains (a) cobalt (b) magnesium (c) iron (d) nickel
The number of geometrical isomers of the [Pt(NH3)2Cl2] is (a) 3 (b) 2 (c) 4 (d) 1
The coordination number of (EDTA)^4- is (a) 3 (b) 6 (c) 4 (d) 5
The oxidation state of Fe in K4 [Fe(CN)6] is (a) +2 (b) 3 (c) O (d) None of these
