Value of Cos 120 degree can be calculated using other trigonometric angles 90 degrees and 180 degrees. These cosine values can be gained from the trigonometric table.
Cos 120°: ValueIn order to find the value of cos 120°, students need to draw a right-angled triangle (refer to the image below) and can use either of the two formulas i.e, cos (180° –θ) = – cosθ or cos (90° + θ) = – sinθ....
The value of sin, cos, and tan of some angles are equal to the values of sin, cos, and tan of other angles. Let us take an example of cos(-30⁰). Since 30 degrees lie in the first quadrant we can say that cos(-30⁰) is equal to cos(30⁰) because all the angles in t...
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Answer to: Find the value of a, cos (a) + cos (a+120 ) + cos(a-120 ) = \frac{3}{2}. By signing up, you'll get thousands of step-by-step solutions...
The value of sin 180 is equal to the value of sin 0. Learn here to find the value of sin pi or sin π by using trigonometry functions and formulas. Derivation of sin 180 degrees at BYJU’S.
Find the value of (a)cos120∘ (b)sin240∘ (c)tan(−60∘) (d)cot300∘ (e)tan330∘ (f)cos(−60)∘ (g)sin(−150)∘ (h)cos(−120)∘ View Solution Find the value of sin15o. View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solut...
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Trigonometry Table (0 to 360): Formula, Trick, PDF for Class 10, 12 is given here. Learn the formulas and calculate values of all the Trigonometry Table functions.
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